It’s made by us and available on our website buntersyard.co.uk/search?q=mask&options%5Bprefix%5D=last

@@BuntersYard You've got a great website. Some amazing products but I'm HO 1:87. I'd need 9.6mm and 10.3mm masks. I may order some other stuff and hope it doesn't look too oversize. The ATM and the yellow bumpy platform edging are really cool. I haven't seen them done before. Nice work

Bus wires should not be laid as a ring due to digital data being received by a loco from two directions.

@@westwonic Unfortunately, the basic principals of electricity and parallel wiring are widely misunderstood and have led to this popular myth! If you lay a circle of track on a 4x8 board with no insulated joints anywhere and connect your DCC system to it, what do you think the rails create ? A ring! And if you lay a second circle of track on the board around the first ring and then connect wires between corresponding rails of both, what do you think that is ? It is a bus in a ring with droppers running in parallel to the track in a ring. Some years ago, some electronics expert members of the UK's Model Electronics Railway Group (MERG) decided to investigate the popular myth that claims buses shouldn't be rings and they calculated that at the frequency that DCC operates, you would need a ring of at least 2km to even slightly 'widen' a bit received on the other side of a ring. And to completely offset the bits, you'd need multiple km more. IIRC they calculated around 10km. My own layout is a DCC bus ring of around 24m and this is probably larger than many layouts. At the lengths we are talking about, there is insufficient length to cause different data from two directions. Granted that some DCC system manufacturers state that their *cab* buses should not be wired in rings, but that is a separate bus and it is because the network topology isn't designed to operate in a ring.

@@gppsoftware your quoted circle of track is presumably made of Nickel Silver, whereas the bus wiring is hopefully copper wire. The data transmission is via the bus not the track, as evident on my layout which Includes a few reversing loops that include isolating fishplates that break that track circle. I have seen many videos that promote non-circular bus cables, and thus have wired mine accordingly with two buses, including a bus sniffer at each far end as sold by dcc concepts.

@@westwonic As I said elsewhere, the principals of electricity and parallel wiring are widely not understood. If you have a bus running parallel to rails with droppers running between them, the power and data transmission will be exactly the same, everywhere - the data doesn't 'choose' to run through the wires and not through the rails! Power and data transmission goes through wires only in the situation where there is a length of rail with a single dropper and it is isolated at both ends. It doesn't matter how many fishplates are involved (if any). The moment an extra dropper is added anywhere along the length, the wiring is no longer the sole transmitter of power and data because the parallel wiring equalises everything out in that area. The reason we use copper wire is because of its superior conductivity, meaning that it is much less likely to cause voltage drops due to resistance. Voltage drops are still possible if insufficiently rated wire (too thin) is used (gets worse with length) or poor connections at wiring joints are made. We use bus wiring so that we don't *rely* on fishplates as a means of electrical continuity, but where fitted, they will always (or should) be conducting. A bus enables us to insert insulated joints around turnouts and reverse loops etc and maintain power. In terms of the distances involved on most of our layouts, the electrical difference between nickel silver vs steel rail will make next to no difference, likewise, copper wire, assuming all connections are good and appropriately rated cable is used. In reality, nothing is perfect and standard of workmanship becomes a factor. Yes, you are correct that there are videos that promote non-circular bus arrangements. If you understand basic electrical principals, it becomes pretty obvious that the makers of these videos don't! There is only one proponent of (I think you mean) bus terminators/snubbers and he happens to be the same person who sells them and from whom you purchased them. They are not necessary. If they are making a difference, then you most likely have bigger problems and that snubbers are masking the problem, not fixing it. I have asked Lenz, NCE, Digitrax and the UK's 'Model Electronics Railway Group' (MERG) about all of this in the past and they all confirmed what I have written above.

you'd deed 1000s to re create it , ever thought of making blocks of stacked barrels for such yards like chemical companys and truck loads etc