Do you have Process Explorer? Might be DPCs going through the roof, or some other process stealing power... Process Explorer can help pinpoint the offender.
I would extend out your bamboo supports from the floor and flare out the ends. Edit, same with the roof supports, keep it chunky, but don't over do it.
the logs should be alternating one ontop of the other, interlocking. yours are all intersecting. also the roof looks too small to me, extend the shingles out a bit more
roof and clock model were both split up and also assigned polylimits for the single slots already. BUT they are not added to the workshop so far. (may happen next week)
This looks absolutely flawless, apart from the pixels for the roof of the car; something about them is jarring to me. Possibly its the amount of pixels? (i.e. just the one row).
That is something I have never thought of. Do you have any idea on how to overcome such technical limitations? The picture that I've attached looks like a spot on match except maybe the roof.