If you are impressed with 6600 w/t 26-10 for a 100 it does not take much to impress you,especially when a zdz 80 will do what your 100 will do.And as for anyone who has a zdz which is hard to start it is because their low end is too lean.As a matter of fact any engine reguardless of who manufactures it,if it is hard to start its the idiot opperating it not the engine.Bme,3w,zdz,d&a,tarus,and first place engines are all quality engines.And also if you want to talk about a waiting list to get a certain engine,you will also have to wait for a zdz because of the demand.For the longest time RC Showcase could not keep up with the demand.And also my friends problem with his d&a 100 was a air leak around the carb which is the second engine with this problem in my area I was told about.Their warranty has taken care of this I was told.