I really like what I see here. You seem to be a "fast learner" LOL! Engine is coming along great and the paint....well I've been building for almost 50 years now and I still can't do better than You when it comes to paint. Keep up the good work and let's see more nice builds!
I really like this build. I agree on some of the constructive criticism regarding a few small details but, unless You wanna put a good heap of money to buy photo-etched parts, this is about how you can build your models.
I've built one of the Kübels myself, but mine is from the company Blue Tank and had a very "toyish" chassie and interior. I scratchbuilt the complete chassie and interior and turned it into a "street rod". I kept it curbside though and used an engine-dummy from a Hasegawa VW Bus. Keep up the good work and let us see more of your talanted work!