Several here in Tucson group
I built a twin Tuggie from Zippkits it can push or pull have a long cord with a float at end ,circle dead boat come in close and it usually snags to pull it in.
Its not fast but you dont need fast
one is an airboat like the one shown above its a pusher
One is a gas boat with a weed eater motor with a clutch. It has a section of PVC on a shaft and around the prop so it can steer in close. Rudder on that set up was not as good. Pvc is like nozzle as it steers. Next time im down there ill try to get a picture. That boat drags a float too.
These all work to push or pull Gas boats as that is almost all they run here.
Good group of guys, they let me run nitro on practice days