"The adhesive holds really well, and in 3 yrs, NEVER had one come off"
On Amazon, many people say adhesive does not last. Do you think there has there been a change in the product?
"Just use a string or length of shoelace to tie your strap through the holes in the zip-tie mount."
Do you have a way of having the strap be snapon/off removable, or you just leave it on all the time?
The mounts that I have use a foam mounting area that come premade with a 3M adhesive, and I've not had problems with it coming off, but then again these ukes weigh very little and I dont try to pull the mount off with my body weight.
Since I use a bootlace or paracord for a strap (depening upon the uke and what I had on hand at the time) I have no reason to ever remove the strap, so I have not explored this function myself. Such a thin strap goes into whatever case I want to use and easily disappears.
The adhesive only lasted a few weeks on mine. It came off while I was performing so I had to quickly get hold while I finished the song.
Fortunately the holders I bought have a hole for a screw in them so I replaced the holder and secured it with a small wood screw. Hopefully it will hold for a long time now.
I use a uke leash. I thread a cable tie through the tie holder and make the loop big enough to thread the clip of the uke leash through it. The other end is fitted to the headstock in the usual way. Flea and Fluke are light enough that the narrow strap of the uke leash doesn't cut into you.
I have attached a strap to my Flea in the same way.
Sorry your zip-tie mount came off and did not stay attached. If you want to replace it with one that should hold better, maybe look for the ones with the genuine 3M adhesive in the foam-sticky attachment part. That is what I've used with no issues, but I am only playing at home with these and have not 'road-tested' them with gigging as of yet.
You can also use a dab ot hot-melt craft glue on the bottom of the mounting square, which will hold stronger than the foam's sticky and also should not harm the ABS plastic of the Fluke/Flea. I have done this too. It is the kind of glue that is sold in like 5mm wide x 40mm long sticks, that you insert into the back of a 'hot-melt glue gun' which plugs into the mains, and the glue is fed by a trigger and melted out the nozzle tip.
This kind of kid can be had for a few dollars at most hardware, and also craft stores. Be careful though, when the glue it liquified, it is hold enough to cause 1st degree burns and evoke some 4-letter words, but it cools to the touch in about 5 mins, and cures solid in about 20 mins, and will usualy not come off unless you get a fingernail or knife edge, underneath it along the outer circumference, and then it will basically just peel off, with little force required to remove it. However, it should hold, and I have tested it up to 5lbs which should be enough for a uke.
Also, the glue comes in different colors as well as clear or black, and you need to make sure that the GLUE STICKs you buy are the proper DIAMETER for the GLUE GUN that you have, as there are 3,5,7,10 and 12mm diameter glue sticks/guns here in the USA, and fatter sticks will not fit into a smaller glue gun.
I should add that you need to make sure to UNPLUG the glue-gun after using it. I accidentally left one plugged in over night and was lucky that nothing bad happened, but the TRIGGER is not a power switch, but a mechanical LEVER that feeds the glue into the heated nozzle tip, similar to how a caulking gun is used with it's mechanical plunger at the base.
hot glue gun ^
caulking gun ^
Hope this helps....