Hi Diablo and Aerografixs,I am glad someone has a positive attitude and realizes that zdz engines are great engines.I would also like to say that there are zdzs which have been flying over a year.And if you have one which is hard to start, the low end setting is too lean just as my friends d&a 100 which is also lean on the low end and also I would like to say 3w,bme,d&a,tarus,and first place engines are all good quality engines.It is just the fact that some people know how to make these engines perform while others do not and then make negative remarks.I was the first in my club to own a zdz and now several members have purchased zdzs.Also the way I arrange batteries and servos I have only had to add weight to an extra 300.I had my zdz60 on a lanier cap with servos in the tail and it came out nose heavy.I put my throttle servo and my choke servo inside the engine box with my battery packs attached to the sides.Thanks guys for your positive attitude which alot people in this hobby do not have.