Hi Gonzo,
I think you will get some clinics to perform ht surgery on you if you go into it with realistic expectations. What a diffused thinner can expect eventually is to lose the native hairs, especially w/o any ht meds. What may occur, for example; a diffused thinner has native density of 30 fu's per cm2, add 25-30 fu's per cm2 via ht surgery, so the result you should get is 55-60 per cm2 but loses all native hairs so he is back to square 1 with 30 Fu per cm2. This patient will then need another ht to thicken things up.