Wonder if someone can give me some advice on mouthguards.

I do some boxing training, and I spar but dont compete.

Being dissatified with 'boil and bite' mouthguards (poor fit, uncomfortable), and not wanting to ruin my good looks I invested in a custom one from dentist, costing me £60.

The fit is great, and the guard does not move when in my mouth, but just one problem. If I clench my jaw with guard in for any length of time, it makes me gag.

Should I take it back to dentist, see if it can be trimmed (around the soft palate area)?

Or invest in another one?

These opro custom ones get good reviews

Custom Made Gum Shields | Custom Mouthguards | OPRO custom

That said, I dont really want to have to shell out another £35+

Any advice guys?