[Wormius]

I must have been either entirely lucky or something that for all of the deadlocks that I replaced, they were all Weiser ones. A few days ago I bought a Schlage electronic doorlock and it has been a nightmare trying to get it keyed to work with my Weiser key. Locksmiths refused to change it, so I ended up Frankensteining the cylinders of the Schlage and Weiser together to work. Then after getting it all working properly and removing the old deadbolt, I find out the electronic doorlock requires a larger cutout in the door. Any suggestions for drilling a larger hole with a hole saw? I was thinking of sticking a block of wood in the existing hole so I can centre the hole saw. My past experience has been that if I don't centre it. The hole saw will be all over the place until it eventually digs in. So would the block of wood in the hole be the best way, or has anybody used a different method?