Hello, i own a  1975 mixmaster,  i just saw a picture of one onthe   bill crews site of a mixmaster same year as mine withfixed landing gear,no one seems to know who has the stc or how i go about   converting it,, seems the older  we get,, not having the wife yell, HEY! the landing gear! would sure keep my nerves from becoming  frayed,(kidding) seriously, anyone know where i can  find out who has the stc"s on  that mod? thanks