the mk1 boxes can be repired if need be,,the collars are cheap enough aswel, iv just sold a mk1 box + collar for £130 but then only paid £90 for a mk3 ? some people just prefer the old ways,( as they say if its not broke, theres no need to fix it!) the mk1 does me fine, everyone to theyr own, but as for tug saying only simple people cant work out the mk3s, what a fecking dick,,(always was a pr**k) lol,it aint up to you to call people thick!, if i took the time to figure it out,i expect i could in no time at all, but why when the mk1 does me fine? alot of folk use the mk1, and have no trouble