I checked my files and I have a version called pl_boundary_b2.bsp which had much more open ledge with nearly no fences, and more hiding spots for red pyros. I mean it was kinda stupid and I understand why it was changed, but boy it was fun :D

YES! Thank you! This has been bugging me for a while now, I wish I posted about it earlier :)

Hello,

I'm trying to remember an old payload map I played 4-5 years ago, and any help would be appreciated.

This was an industrial looking map, 1 stage if I remember correctly. The one thing that really stuck with me is about halfway through the map, the payload track would be on a long and straight ledge. When you were pushing the cart, your right side would have a deadly fall, so red pyros would come from the left side and airblast the hell out of you. Like I said, this was an industrial looking map and this was a ledge, not a cliff.

At the end of the ledge, the tracks would turn left and that was the last part of the map, where red snipers had couple of very good positions.

I know it's not much to go on, but if anyone is gonna remember it, it's going to be because of that ledge. Thanks!