I've been trying to strike a balance between keeping to my word and being practical, though it's certainly easier said than done. I'm more than happy to look into another method if someone has an idea, just let me know.

Thanks. I was just curious. Perhaps there should be some threshold whereby you prefer repurchasing shares from the exchange at a discount? I'd rather see each 1 BTC go towards buying back 3 or 4 shares than 1 share. That increases everyone's expectations in the long run. But, that may simply not be possible due to commitments you've already made.