Back in the day, some BLF group buys for custom lights were done by 1 (or more) of us - seemed like a lot less went wrong, but nowaday's the shipping costs and sheer volume/demand would be prohibitively insane.
I'm thinking of the UF-2100 done by E1320 (Eric), reviewed by Foy here: https://budgetlightforum.com/t/-/10026. I recall Eric goin nuts trying to get them out...