Build-n-flyer,
Thank you for your responce. Great to hear that you manage to get the GP Extra that is an excellent flyer to fly even better.
Also good info in regards to my question on right thrust. With this in hand I will trust having a straight firewall/no offset thrust as per plan.
Please chim in on this thread whenever you feel for it as I think all aspects and ideas should be considered before taking the plounge.
As my friend Superworm said "measure twice and cut once".