I took a standard select version and did the following to it.
1.made another landing gear block further forward to locate it for tail dragger. This is directly behind the fuel tank.
2. Put a Sullivan tail wheel in the back, had to install some metal type epoxy first for the bolts to anchor into.
3.Opened up the wings and installed needed wood and balsa to attach struts.
4. Used existing landing gear block and holes to put in tin nuts to attach the struts to plane.
5. Existing motor mount fits Saito 56/72 perfectly, just locate 2 holes for the rear engine mounting bolts. Use the existing front motor clamp bolt holes to mount front engine bolts. The 72 gives unlimited vertical. 56 doesn't but has enough to make it fun.
6.Left over front wheel steering rod assembly can be put on left side for the throttle or move the existing throttle rod. If using a saito 56 use the steering rod on the right side, throttle on right side works almost perfectly.
7. Installed one set of brace wires on tail feathers anchored to existing vertical stab bolt.
8. Made struts out of 1/4 " dowels and electrical wire ends.
Put it all together and it balanced exactly where it is suppose to with receiver and battery in stock location. We've had a lot of fun with it.
I have another with a MDS 58 in it. Now that thing goes!!! Crack the throttle and put the nose up immediately and go straight up fast. Take off in less than the length of a car. Much more vertical than the modified one but this one is still in standard design. Needs about 2 to 3 oz. in the back to balance it but I haven't put that on yet. Just wondering how long it will be before we tear it up.