Sunny

Get yourself some carbon tube of the same dia as the washers on the wing fixing bolts and glue them into the belly pan over the bolts, a further refinement is to get another tube that will insert into the previously installed tube and silicon sealant fix this inside the large dia tube to guide the allen key, silicon sealant is used so that you can remove if needed to change the wing fixing bolts also if needed.

Pic below shows my Javalin, the inner tube goes all the way to the bolt and is centralised by two rubber O rings, top one fixed in position by silican sealant, its inportant to fix the top one otherwise it will vibrate out in flight and you will loose it.

Hope this helps.

Mike