Thanks for the reply man! Yeah, I was actually thinking of the tradition reaping position with the foot isolated on the outside as opposed to the inside which is the more accurate description of 411/Inside Sankaku. I guess even still with that you would be able to flare the knee to the outside and perhaps I'm doing it wrong (Still a white belt after all), because as I think about it, you're probably right even with the reap position as I could flare his knee outward to create that tension (I think the issue I'm having is that I switch to my inside hip to triangle my legs, but I need to switch back to my outside hip to turn the knee outward). Admittedly it's not my go-to or favorite position for attacking as I prefer to maintain the flexibility to bail on the leglock and pass the guard if things aren't going as well, and (to my pathetic whitebelt) knowledge, it's not as easy to bail from a reap.
The inside heel hook is definitely a stronger finish. I prefer the outside for two reasons, the main one being that I'm deathly afraid of hurting a training partner, even if on accident, and the inside heel hook has a smaller margin of error, so I really will only go for it on the training partners I feel most comfortable with. The other reason is that I prefer to have the foot isolated so they can't use their other foot to try and disrupt the heel hook attempt. Granted there are options and ways to prevent it, I just haven't used them much because I'm apprehensive about the risk of injury.
50/50 was my jam when I first started as I had bought Ryan Hall's DVD series before I actually ever bought a gi, but as I've learned and advanced in leg locks, I've realized that there are better ways to attack a leg without putting your own feet in harm's way because people have caught up. However, a couple guys are starting to use the Hayden 80/20 system, I've never used it, do you have any thoughts on it?