The glue actually worked really well. No seam. The only downside is that it's kinda hard to sand.
Right after brushing the thinned glue on-
Same cabinet in it's last coat of primer-
I'll say for me, on a flat surface, I'd still use bondo. But the glue method works awesome (just like jinjuku said) for sealing round overs and for doing the edges of the backs of the Tritrix (basically the part where all that's exposed is the endgrain of the 3/4" MDF).
I also got the grills covered. Should've gave the frames more than a day in my cold garage to dry though, I scratched the backs w/ scissors
. For attaching the grill cloth I used carpet tape (fairly thin, double sided tape used for seaming carpet; available at most hardware stores). Stuff worked really well, super sticky and easy to work w/!! Plus I already had some, I use it to stick my recaps to my kneepads.
Grill w/ carpet tape-
Grill on the speaker-
I hope to get the backs painted tomorrow, then I can veneer these babys and I'll be in the home stretch!! The worst part of this is having to listen to the Polk Audios while I'm finishing these