Projector changing lamp and cleaning dust on lenses - Optoma HD36 / HD151X

Old lamp life was 3550 hours (!)
Videos before/after were recorded using Filmic Pro on a Google Pixel 3a phone using the same exposure setting: ISO = 200
Brightness was measured using an android app named Light Meter (com.tsang.alan.lightmeter) and the peaks before / after are 95 then 420 (when displaying a plain white image)
New lamp is a 170€ lamp (not bought from optoma): reference "OPTOMA BL-FU310A (FX.PM584-2401)" "original inside"
---
Optoma projector teardown / repair / apart / fixing / cleaning / internal optics