[TD78]

Up until last year, we had used 1/4-20 almost exclusively. We made the switch over last year to #10-32 and 3/16" pop rivets based on the recommendations found here on CD. I never thought we would go smaller until using the 2014 VEX chassis...we now have a large collection of #8-32 hardware. Haven't had to go any higher than 1/4" this year, which is only used with the VEX "tube axle" (seriously love the concept). Definitely use #10-32 the most...small, lightweight, everything else others have mentioned so far.