Kayak Clamp- Fits Hobie H-Rail , Track system

I wanted something I could really clamp in place the stock one moves quite a bit on me, this one uses 4mm bolts I believe I used 16mm length on either side and accepts a track mounted item, not as convenient as the stock one but this is more for those items you want in permanent spot
Work in progress this is version 2, version 1 is also included
Version 1 allows T bolt to pass straight thru top rather than sliding in and bolt in bottom from clamping