Hello to everyone out there. I recently got the stock 15 inch coil for the T2 classic. The depth is definitely more impressive. I just noticed that there are also extra large coils for the T2 from after market brand manufacturers NEL, Mars, and Cors. I think the one from Cors and NEL are 15x17 and the Mars coil is a 15x15. Just wondering if anyone out there might have some experience with some of these coils, and if so, what are your thoughts on how any of them perform. Any suggestions on which one is deepest....