Oh, then what would you recommend? For 10-12s setupI'll preface by saying I love castle products, but you'll have to be careful of your weight and load on that motor. The mtxl can get heavy really fast and that motor will get hot lugging it around. Make sure you don't smoke it. As losi rates it at 37.5lbs your right at the limit of the 2028 rating.
Castle be better for xmaxx, since it's 30 pounds. Mtxl I think you are right about a 500kv or 800kv at mostThe 58113 has multiple kv ratings I think 530kv is the lowest, which should give you all the grunt you want. Just an idea. I think it would be a much better choice then the castle motor, and I love castle stuff use it in nearly all my e rc's.