I dont have the numbers on the prop spacer, you can look it up yourself on Jackssmallengines.com , a pretty good web site, then of course you can order from them also. This allowed me to keep my carb inside the cowl on my DVII also.

I took MOST of the carb springs off mine also. You need just enough tentsion to push the barrel out from the carb (keeps the needed at the proper spacing) Cut both hooks off the ends and then take loops off one at a time until you get a good tentsion.

I usually tighten my prop hubs with the prop on, holding onto the flywheel with a rag, this "strong arm" system has worked fine for me, never had a prop spin off using a starter.

Word to the wise on the DVII though, KEEP IT LIGHT! This engine is no powerhouse and most of the Balsa USA DVII's are comming out 20lb or higher (mine is 21 and I built it light as possible). Others tell me that thiers are 17-18 pounds with a G26 (remember, a G26 is 2 1/2 pounds lighter) I had a couple of scary flights when high humidity seemed to rob my Briggs of most of its power. The plane took off but it wallowed in the air....got it back to the field with no problems though. The DVII is increadibly forgiving.