Did you "pre-tap" your foot strap inserts with a 6mm x 28mm foot strap screw, then lubricate the 7 mm x 32mm foot strap screws with a bar of bath soap so you can get the 7mm screws really tight without breaking the off the head of the screws or destroying/loosening the FS inserts.?
Are you using the oval toothed washers on the top side of the foot strap (opposite the spikes in the K9
If you have done these two steps, you normally only need to tighten the foot strap initially, and then snug them up after your first session on the water.
They will stay tight almost for the life of your board.
Hope this helps,
Last edited by Roger; 21st August 2013 at 12:18 AM.