Here’s another, fairly recent, thread
https://forum.tudiabetes.org/topics/deciding-on-a-pump
I’ve been on the MM for 15 years, so I’m prejudiced - but when I just got a new pump I went with the new MM again for many of the reasons you posted, I just didn’t like having that bulky thing (the trial fake omnipod) stuck to me.
I do situps with the MM infusion stuck in my butt (although I usually use it in my abs). No problem with yoga.
I used to just take off the pump when swimming, give myself a 0.5u bolus, then take it off - as long as I was moving and getting some exercise in the water (vs lazing about in a hot tub), I never had much trouble with BG going up for that 0.5-1 hr.
Bad shoulders, so I don’t swim anymore though.
Not sure what to do about a tri, at least not one where you end the swim in a different place than you start, so you’d need someone to transport the pump for you. Or, use a water proof case. When I kayak I just put the pump in my bra and it handles the damp just fine (that was the last one I had that they hoped would be water proof, they don’t even make that pretense anymore, so not sure how good that would be for the Revel).
As far as body fat, they have some very short infusion sets for folks like you.