I am looking at a set of disc, for my 37 hp Kubota that weight 845 lbs with 20, 18" disc. I like the set except that to adjust the angle you have to remove a bolt. For various reasons I adjust my current set quite often and to do so all I have to do is remove a pin. Could I replace the bolt with a pin without doing damage? For those of you who have Massey disc what is your opinion of them? Thanks!