Tips especially for spring bypasses. There are some on youtube, but I doubt any of them shows the best way to do it. I do believe though texas_ace has a very good way figured out.
Yes, Tweezers are the best idea to hold them in place. Although now days I generally just use my fingers, it ensures I get it done quickly lol.
Far as the technique, it is not secrete, there are a fair amount of pictures of my bypasses floating around.
In a nut shell the idea is to minimize the bending / flex of the wire when the spring is compressed. This causes failures over time as no matter how hard you try the wire will wick up solder and become hard.
So I find that wrapping the wire around the spring about ~90-180 degrees depending on the light to minimize the bending of the wire gives the most reliable bypass.
You end up with a longer bypass then other methods and a little more resistance but well worth the extra reliability IMHO.
I have had basically all my other styles of bypasses break over time but have not had one of these fail yet that I know of outside of a soldering mistake by me.
My XHP35 CW has arrived a week ago. But I notice that there is a purplish glare inside the glass when the flashlight is on and my friend also notice this. If I unscrew the head and pull out the glass, it’s gone. So definitely the glass has a problem.