On Wednesday, June 13, 2018 at 12:51:35 AM UTC-7, JohnO wrote:
Thanks Bumper I have ordered some UHMW-PE tape from Amazon.

Incidentally UHMW-PE tape is ideal for providing a sliding surface for the wing spar stubs at the ledge of the fuselage spar box opening. Putting the tape there is particularly advantageous for solo assembly as it prevents abrasion damage to the bottom of spar stubs.