You could attach a generic tail wheel unit TOO the bottom of the stab, doesn't matter where, that is front or back of the stab.

Pick a unit that has a duel control arm so you can use a "pull-pull" cable system to operate it, it's real easy.

Two cables run from your rudder servo out two holes in the bottom of the fuse a few inches in front of the stab, very simple and fool proof... no offence If you want details just PM me.

I make mine from U-control cable I bought at a flea market for 50 cents, two 50 foot rolls last a long time.

Tail draggers are fun, just remember to get off the elevator once the mains touch or it's back into the air you go.