Thanx Nige....
Chappie...
think ref is to Geoff Buff Hoon....
As for J & K....
K is the older C130...30yrs service ish
J is newer faster /higher operating....????? model
However, it flies slower than 737 at same altitude so CAA wont let it fly in the same airways so it is in a few peoples eyes a white elephant....
Good microwave though on flight deck !!!