I have the Avery RV took kit and got most of this.

I would go piecemeal. Delete the 2 bucking bars and get a tungsten one. You only need the 1/8 cupped rivet set, and you will need a single and double offset 1/8 set also. The flush rivet set I got from Avery has a rubber foot around it, which is quite helpful in keeping the dings away.
 
Thank's for the advice.

I'm a new builder (RV-7 #73881) and stuck in the middle of the tool-research adventure...

I think it will end up on buying a complete toolkit from Avery, Browntools or Cleaveland Aircraft Tool........

Regards
Dan