Liteon stability?

I was wondering if anybody has tried swapping out the the one watt carbon resistors on the power supply of either 5005 or 5045 for 2 watt metal oxide resistors of the same value. Has anybody thought about it besides myself.
Metal oxide resistors are used alot in situations where heat is an issue. I may buy another unit this week just to see if it improves the jitter. AS for the picture quality on the 5005 and 5045 --I looked at the solder inside the 5045 on thje ground of the tuner and it is definitely not silver solder of any type.
Besides that it does not look very well done either.