Also what is the situation regarding sevis, visa etc? I flew over there 3 years ago and had to get a 61.75 which took forever, will I need to do this again? The training will all be dual so do I need to go through all that hassle or can I just turn up and fly?
You are exempt from the requirement to get a TSA clearance. TSA is only required for initial airmen training, for IR, ME and type ratings above a certain MTOM.
https://www.flightschoolcandidates.g...c§ion=WN#C
If all the training is dual you also won't need your own licence. The instructor will be PIC. Similarly, you won't need a US medical. But if you already have a 61.75 "piggyback" PPL and the underlying licence (including the licence number) has not changed and is valid, then you should be able to "reactivate" this PPL with just a BFR. And for a 61.75 you can either have an FAA medical, or a valid medical attached to the underlying licence. This might come in handy if you do want to do a solo flight at some point in time.
Visa is a far more debatable issue. You might want to search this forum for more opinions, and here's a few links that you may want to read:
Visitor Visas - Business and Pleasure
English USA - Issues related to study on B status in Intensive English Programs
http://www.pprune.org/private-flying...art-1-a-5.html (start at post #90)
In your case my gut feeling is that you would need an M-1 visa. But I would call the embassy or consulate first to confirm.
The big issue you'll find is that M-1 visas can only be issued if your "sponsor" (the school) is connected to the SEVIS system. Which is typically only true for Part-141 schools, and specialized flight schools like aerobatics, tailwheel and seaplane schools are not normally Part-141.