I think you could grind or file down the point that the kick strikes, using a thin file or grinding bit, or maybe just an ordinary drill bit. I took the blade out of my 3.5 to clean it up when I first got it, and, I can't remember for sure, but I think, with the blade out, you may be able to move that part into a more reachable position. It shouldn't take but a tiny bit of grinding.
K-390 on hand: Mule Team 17, Police 4 G-10, Endela, Endela backup & Endura (micarta scales)
On pre-order: Straight Stretch & next, Dragonfly Wharncliffe