Originally Posted by
Mark Vandervelden
Hi Jetster81
Would be helpful if you could let us know which "Turnigy" servos are being used by you pal?
There range of servos is huge, some are very good but unfortunately others are, well not fit for use 
Hi Mark, amongst those being used in Jet use that I am aware of are the following:-
TGY- A55H Slim wing servo in a thin tail application.
ASB-714MG
TGY-DS3509MHG HV
TGY-DS725MG HV
TGY- BLS815MG HV.
I am sure there are others but the above appear to be ok.
John W, can I take it that you will continue to fly the Viper with the remaining servos?