That wouldn't be a bad idea as I was going to have 4 to 5 servo setup but decided to use the bellcrank system. Because of the flap servos and othet add on surprise I did a lil modification to the linkages close to the crank widened the hole and length of travel room for the clevis. But I'm going to do a dry run on that and the top secret to make sure of proper throws. ..
But as far as your retract question I'm not familiar with the electric ones but I'm sure they would work I have the pneumatic robarts. I'm sure mechanical ones would not work due to thr servo and linkages ... and last but not least I also have the TBM and Hellcat. This would be my second Hellcat first one wad damaged beyond repair when o transferred in the service. I'm thinking on getting another TBM have a lil squadron ! Nothing else we should do a group build for it and see if we can get a few others onboard to support them!

Any other questions on the build so far feel free to ask or pm me if ur not clear on anything! !