My First Job To Assemble Toyota 4 Cylinder Engine 22RE

Last November, I downloaded all the files from http://www.thingiverse.com/thing:644933/#files published by ericthepoolboy and printer few parts for each spare model. Some of them lost during the next months. In order to complete this work, I reprint some parts and start to assemble Cylinder Engine and complete the main parts at last weekend. 
It took me about 3 days and 2kg PLA filaments, please note that mini gear motor should be long enough and use 3-6V one. I also have a problem about valve seat, valve and camshaft, they are not easier to print, anyone have a solution or good idea?

PS: attach a vedio as a reference, it's not perfect, we will make it better 

PS: These are the parts made last time, some of them are miss.