Probably not a good idea to mess about with the recovery partition (RP). For a start, & as a precaution, I'd strongly recommend creating a recovery disc(s) if not already done - guide to do so click here. This way, even if you lose the RP, at least you'll have a backup recovery method.
I think the RP needs the extra space to 'expand' during the recovery process. Having said that, I don't know if it needs all of 75Gb, or what's the minimum either. If you create a new RP & move its files there, it would need to have the same attributes as the original RP.
The best place to pose your queries is at the official Toshiba forums click here I think. Forum registration via click here. G