Hi, l have a new skiving machine, a Sieck from Germany/Far East which is a Fortuna clone. I am just getting the hang of it but then it started making wobbly cuts. I have looked this up and the booklet suggests tightening two screws on the knife shaft, but it doesn't say how to lift the machine up from the front and tip it over to gain access. I guess l need to unhook the drive belt? But how to do this and which end of the belt? This is a new machine so l don't want to just dive in and ruin it. Any guidance greatfully appreciated. Thanks, Tim