Ok I am at work at the moment and I do not have the measurements but here is another photo showing the front engine, directly behind the firewall is the bay where the servos are to be mounted per the plans. I can tell you off the top of my head the distace from this bay and the tail of the plane is greater than 54', I can get the exact distance later tonight after I get off work.

Push pull is a very interesting thought, I would still have to use guide tubes to avoid air lines and electronics but tubes are a need no matter what the final design is.

http://image.rcuniverse.com/forum/up...02/Nl30818.jpg

There are additional photos of my build in the link below but the above photo provided the best view of servo bay.

http://www.rcuniverse.com/forum/m_5326051/tm.htm