The tone of Nathan Sowter's voice suggests he might be being polite. Released by Middlesex after eight seasons at the end of last summer, the spinner has spent most of this one making a mockery of the county's call, first in a superb Blast campaign for Durham and now as a key cog in the Oval Invincibles side that has powered into Sunday's Hundred Final, where, for Sowter, a return to Lord's could be particularly sweet.