Hey Tezza, re: engine removal from a Model 45, you just undo the nut on the clutch cotter-pin, tap in down to release it from the shaft, and slide the engine out, you shouldn't have to jimmy it off. You could fracture the clutch half if you tackle it without extra care.
Please do not PM me asking for support. Please post your questions in the appropriate forums, as the replies it may receive may help all members, not just the individual member. Kindest Regards, Darryl