Gag inquiries and advice needed

I’m in the market for a gag. The concept really appeals to me, and I think the drool factor is a plus too. Since it’ll be mostly for self-bondage use, I’d appreciate some advice on style and material. Ideally, my wife would enjoy having me wear one while servicing her. One complication though: I had jaw surgery this spring, so my range of motion is limited to about 1.5 inches.

So, fellow members (and potential tormentors), do you recommend a ring or ball? If it’s a ball gag, what material works best? And should I get a trainer style or the standard version? Cheers, iBorg