I have a door that I would like to put a new lockset on. The problem is the hole (the big one for the knob) is too small for the replacement lockset (SCHLAGE). Does anyone know of a way (trick) to center the hole saw over the hole. Is there something on the market that I can buy to center the hole saw or will I need to make something? Thank You.

Hi, We just moved into a new house with a ton of windows that get a lot of sunlight. My wife is worried about new furniture and hardwoods floors fading, as well as reducing glare (not so much worried about retaining heat). Our windows are Barber & Ross - a so-so window manufacturer here in Virginia. I'm trying to get the exact specifications of these windows. They are allegedly Low-E, but not sure "what kind" of Low-E. They might have argon, they might not. The U value is apparently between .40 and .37. We have an awesome view, so my wife wants to preseve as much of the scenery as possible. She is getting a lot of solar screens, but for some rooms, she thinks it won't work, hence the need for window tinting. So my questions are: 1. If I'm not worried about voiding my window warranty, is tinting windows a good idea? 2. We've been pitched 2 products: 3M Prestige and 3M NightVision. Prestige is pricer, but apparently looks better from the outside and contains no metals, helping with cell phone reception. NightVision is more affordable. Nightvision will cost us about $20/pane and Prestige $30/pane. Does anybody know anything about these products and/or window tinting in general? Is it worth the high cost? Are solar screens a better idea? Thanks.