I'm tryin g to replace the telltale elbow on the block. I removed the old one with no trouble, threads are clear, but just can't seem to get the new one in place because my hand is to large, my wife tried to (very small hands) to no avail. I'd hate to pull the powerhead to replace a $2 part. Any tips or replacement trick? If not I think I might try a small bolt to block it off permanently, as I pretty sure it would be easier to get into such a tight place. Semper Paratus