I would suggest reading Max Hunt's (from Southeast Sailboats) way of rigging the outhaul. You don't necessarily have to buy it from them, but it might give you an inspiration of how you want to do it. Here is the Link: Outhaul Systems - Ordering Guide
I am a recreational sailor. I am not interested in racing. That means I can use modifications that are not legal for racing in the Laser class.… and go back to the classic setup, just for me seems much cleaner and simpler for a recreational day on the water.…
For the outhaul, I have a block with a hook for clew attachment. Not sure if you can double block it so it doesn't pass through horseshoe loop.
Outhaul - most of the friction in the system is between the clew strap (or tiedown line) and the boom. See that your inhaul is tight and "fresh" enough. If you don't have one to begin with, check out the above Rooster video at 7:03. (He says at 2:38 that the inhaul has to be attached to the boom cleat which is not true anymore, but don't worry about that.) Mine is fundamentally similar, with a 5 mm elastic which works fine (Steve's looks like a 4). I simply use a square knot where he has a hook.