Just Incase anyone is interested there are more than one way to get a dimple precicly where you want it .This is one way .First get block aligned then Chuck a bit backwards (or use a guide rod that barely fits) in the threads of block and lock the barrel down directly under the drill so that when raised and lowered the guide goes in and out of the threaded hole . Next you replace the bit with one barely smaller in diameter than threads and use it to start the dimple . Now you can remove the block and reindex barrel under the drill using small bit indentation as a guide and proceed with larger bit . Of course pre set depth before starting the drill . If you are not mechanically inclined enough to do it this way you can contact Magdump and ask nicely and he might let you borrow his designated tool .
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