Either way will work fine Bob, do what you think looks best
Thank you Darryl. I hope the day comes when I have enough experience that I won't have to ask dumb questions.
Thank you Wayfinder. CBN is the premier site for my new passion. I've been collecting the heck out of parts and other items for CBG's I even found some decent Cigar Boxes the other day so I'm excited to get started building a few. I've read quite a few of your posts and have seen that you readily share your expertise. Thank you for that. We newbies need all the help we can get.
Wayfinder, I just noticed that you live in Platte City. I went to Platte City HS in 62/63. We moved back to KC so I lost touch with all my classmates. Many fond memories of that area. I've lived is several states since then and now live in Texas.
I ran a test with a 5.4K four pole single coil on a three string cbg, poles and strings both spaced 30mm, so that the middle string is situated between the middle poles of the pickup. A blade overneath the pickup has only one effect: it looses volume. So check carefully for a possibly positive effect before you superglue a nail onto the pickup...
Thank you Moritz. I won't super glue it until I hear the difference.
P.S. Crucial for comparison is an equal distance between a blade or a nail from the strings, otherwise you just raise the pickup which in my tests possibly compensates for a loss of volume.
No tests or data to back this up, but at some point the magnetic pull has to effect the strings ability to vibrate /oscillate i'd think, and effect volume less than sustain probably, as i say, just my thoughts.
P.S. Adding a 0.15" blade, for comparison you would have to lower the pickup 0.15", otherwise you just raise the pickup for this amount which increases the volume.
Further experiments with my 5.4K four pole single coil alnico5 pickup with a plastic cover: I used a 10" piece of a very fine string to find the magnetically hot spots of the pickup. On the surface of the pickup hottest is the point between the middle poles, second the middle poles, third the outer poles, at a distance of 0.20" same results. With a 0.02" steel blade above the poles nearly same results, but with a better response for the outer poles.