I used the velcro to attach a jet motor to an old bipe wing I had
and it works great. This works the best so far.
Better than the two sided carpet tape which, over time, became
impossible to pull off without causing wing damage. The original
AA tape would loose its stick over time and attract dirt.
Now I can switch wings, move the motors and try different angles
in just minutes.

The products by themselves didn't work at all but the plastic from
the 3M works great with the white strips from the velcro pack. Both
products have strong adhesive backings.