Ed,


Almost needless to say; I am 100% with you on this, with the exception of YS and some specialty two-stroke engines that are set up specifically to use more nitro.

But OS and clones, TT, Webra, ST, MVVS, Rossi and most others will not gain much from 15% nitro, or would even need modification.

Jetts, for example, are set to be run on 15% nitro. I am not sure they will run very well on 5%.
Maybe Bob Brassell can answer this.