Have just done mine on my MGF, 1 & 2 not working so bought two ceramic 30w resistors for 79p each from Maplins, these are more sturdy than the original ones that came off as the wire to solder is quite a heavy gauge before terminating in the resistor.
Also tied these together with some solder flux wire, twisted and soldered so it will not come apart. To secure should a leg break!
Works a treat now! so thanks to all posting here! If anyone would like the part numbers I can look them up and list. The largest resistor was fine so didnt replace!