Here is something you might not have considered. I have a Ryobi Hot glue gun.
https://www.homedepot.com/p/RYOBI-1...-3-General-Purpose-Glue-Sticks-P305/300335930
As I already have a number of Ryobi products, I already have the batteries. This glue gun puts out the glue! Where i works great is in the field. The ground jumps up and smacks your plane, broken wing, this facilitates a field repair and you are back in the air. Two big thumbs up from me! The cost of the unit and a battery is pricey compared to the cheapie wallyworld but it will be a tool you won't fly without.