Can't build the Snake...too busy watching the new builds
and I don't have a magic laser machine (or the ability to draw for it...)
meatbomber - do you have Snake plans??? (Oh, oh....)
Suggestion...design the exact rigging plan before planning/installing the servos.
Things like drum track diameters, drum rim diameters, necessary slack travel, separate headsail servo?, rudder rigging, etc will define servo setup.