You could try using medical hose. To attach that use a rod slighly
larger than the inside diameter of the hose. Wrap with a tie clip to
hlod onto rod. Make sure rod has a hole to fasten to the board. I
used foam road bike grips as a padding.
--- In email@example.com
, "russellken73" <russellken73@y...>
> What's the best way to attach homemade heel straps?
> last time I made a hole in the innertube and put the bolt straight
> through it and the straps. The bolt tore through the rubber
> much pressure.
> Any suggestions?