The LE-032 is ok, but has "rifle sights" to aim the laser, since it has no aim box on a "screen". It can be cantankerous to aim and be 100% sure what you're ranging. I have mine set up to coordinate with my 30 yard reticle. It works fine, I just prefer the aim box in the Simmy.
The Simmy is held by an adjustable "jaw" and the grip is enhaced by the velcro. Won't work with top mount quivers like the "Munch mount".
Taking your rf apart, look for the 2 wires that attach or lead to to your unit's switch, those are where I wired the pressure switch. I am still able to use it as a stand-alone rangefinder if I don't have it mounted on the bow. You can still use the unit's original switch, or attach the pressure switch to the velcro on your rf unit and use it that way.
In the past I found I could see the rf readout and the scope image at the same time, like looking through binoculars when properly adjusted.
In the 1 pic you can see the width adjustment, and the other pic shows it doesn't have to be all that complicated to work good.