Seabe - I tend to skip the CF decals on my models, I think they are often overstated, and I'm not motivated to spend the time on them anyway. On the other hand, at least in the larger scales, seat belts are quite obvious in an open cockpit F1 car, as is the seat. I usually do a bit there.
I've made some progress on my MP4/5, and since taking the photos have sprayed the fluoro pink, so it will get some decals tonight. I may even get this thing completed in the next week if all goes well.
I think I'm committed to the Ferrari F92A as my next model too, the kit needs a lot of clean up that I've been progressing in between times.
I really want to get to a Ferrari F93A, which will be a conversion, sometime later this year (I hope). The word is that either the Tyrrell 020 (Tamiya) or Ferrari F92A (Fujimi) is the best base kit for the conversion, so I think I'll do the F92A, then a Tyrrell 020, and by then I'll be pretty familiar with both kits and can plan out the conversion.
Studio 27 did release a resin Ferrari F93A years ago. It's almost unobtainable outside of Japan, and the examples I've seen are going for more than I will pay when a relatively straightforward conversion will cover it.