You may have "sprung" your wheel. If memory and description serve- If the wheel is sprung, the spokes on the side where your rim hits the brake pad would be "looser" than those of the other side or the spokes may not be tensioned tight enough.

I don't think your weight would be a problem, I'm a similar weight with no problems.

Loctite is a good idea, you can get it in formulas that are designed for adjustability that do work fairly well. DT spokes recommend their own preparation, I believe it can be applied after the wheel is built. I use linseed oil when building wheels to prep the spokes, but I don't know how well it would penetrate an assembled spoke and nipple.

[Edited by pat5319 on Feb 25th at 11:36 AM]