I have a 33% Hanger 9 Cap with a 3w-100 and it is the perfect combination. I have no starting problems whatsoever. The engine is not broken in yet but I turn a 3w-26X10 at 6600 RPMS. This prop is a MENZS copy. The engine is getting better with every run. I have no experience with the DA100 line but I am sure their performance parallels that of the 3w. I have seen ZDZ's in action,though, and I must say I was not impressed. I almost bought one of these prior to getting the 3w. I was attracted to the"its so light..blah...blah..blah" that you here all over this forum.The club that I vistited had four flyers with zdz engines. Two of the guys could not get their engines to start and the two other guys had inflight running problems. All of these ZDZ's were broken in. It may have been the heat that day, who knows??? I, however, will definately stay with 3w or DA. One interesting note about the ZDZ is that they are a relatively new engine and I think it would be worth the wait to see if they "wear" as well the DA or 3w. Most of the ZDZ's out there are less than a year old. Another issue is parts availability for the ZDZ. I know that there is a wait for certain engines, so I worry that there might be a long wait for parts also. Just my two cents.