Hydrofoil T-nut Retainer

Track inserts to keep t-nuts from falling out of the foil track. There are different depth and length versions. The A version seems to work for most tracks. The B version is for deeper tracks or if you want a more secure fit. The longer ones can be used to block the entrance of the hole where the t-nuts are inserted. I used PETG since PETG and ABS seems to hold their springiness longer than PLA or nylon (http://thrinter.com/creep-abs-pla-petg-alloy-910/). Depending on your track dimensions, some scaling may be needed.