Hi Ian,
I'm sorry about your worries. Which doctor is suspicious now, the uro? I would be surprised if it were because uros know that grade 1 blc metastasises in less than 3% of cases. Some studies say the risk is more like zero. But because nothing is 100%---there are no guarantees in cancer-land---and because mistakes do occur in grading and staging (pathology), it is better to be safe than sorry and check out unusual symptoms in a young and healthy man like yourself.
My sister Maureen/Mo who also has a Ta,G1 tumor (but it was a singular one) was also thoroughly scanned and tested after her first tumor and her recurrence just to be very sure. As a breast cancer patient I've had so many xrays and bone scans over the last 7 yrs I lost count, but the bone pain was a side effect from my treatments. Waiting for these tests to happen is horrible...but the chance of them showing anything even more horrible is so small, it's worth it just to rule out cancer as the reason for any pains you may be having.
How long till you get the test done? What is the nature of the pain you have?
Thinking of you,
Wendy