Doug,
This controller should work with any brand of electric retracts and brakes.
The controller cutoff is 2.1 amps (Sab Avio retracts).
Dreamworks Pro-Link retracts recommended amp cutoff is 2.1 amps.
Electron ER-40 retracts recommended cutoff is 1.5 amps.
Do not know the cutoff amps for Electron ER-50 or any other brand of retracts.
If still interested I would accept your offer.
If you use PayPal use F&F.
My PayPal address is
[email protected]
Lee