I am way more comfortable with front 5050s on ledges versus round rails, but I’ve been trying to get better at the latter recently. There’s a big mental hurdle for me with rails, so I’ve taken notes on the shit that makes them feel less squirrelly.
One detail I’ve noticed - with ledges, I very subtly “angle in” my run up. On a ledge, this helps me get a good lock-in when I land. It feels like I can apply more “horizontal” pressure into the grind. However, on a round rail, this habit will typically cause me to slip over the heel side after landing on the rail.
For rails, adjusting my approach so that my roll up is more “parallel” helps me feel like I can lock in “from the top”, placing pressure into the rail “vertically” instead of “horizontally”. One of the guys at the park who’s really dialed on front fifties and front smiths on the bar told me he thinks about “standing and pressing” his trucks into the rail to stay locked on. This was helpful for me to generally understand the balance and pressure points. Once you find a good balance point on the rail, it’s mostly a matter of keeping tension on top of your board through your feet until you pop or grind out.
One drill that helped me apply this was actually starting the grind from the middle of the rail. This forced me to align my roll up properly with the rail, and made deviations from “parallel” way more obvious. Starting slow with this - and intentionally holding a slow grind/stall - can also help build confidence in the “balance”/“tightrope” feeling of locking on a round bar.
As the more “parallel” roll up felt more natural, I started adding speed and popping into the grind from earlier points on the ground. I think I actually posted in the “last skate session” thread about grinding the entire round bar at the park one time - this is the process I used to land it that day.