Have the exact same issue as the other comment i have the 53asd and its great the 77 when it worked was great tons of power great collection but had it two months and its broken twice latest time its been in the shop for 3 weeks and they have no idea when parts will arrive in fact I dont know exactly what broke first time was sping and belt on drive this time they think its the gearbox thats gone but have not confirmed anything so at the moment its a £2300 garden ornament
Bought one Really good until 7 days in the belt snapped and ruined the pulley Has taken over a month to get fixed as there are no spares in the country Don't bother And yes Weibang you are welcome to contact me!