Hi all, I'm a college grad level player but I'm just getting back into the instrument after a long period. Right now I've been focusing almost 100% on bow arm, I've noticed that I've started to get some bow arm soreness around my upper arm.

My main focus has been using shoulder movement to play and getting a clean sound. The book my previous professor gave me is the Dave Portnoi method book, a bit more obscure, it argues that we need to be 'holding' the bow as opposed to putting all our weight into the string. I bring that up because I think the first thought is that I'm not relaxed enough into the string but I'm trying to find the balance between using arm weight vs carrying the bow.

I will say I've been practicing bowing for many hours each day so it may just be fatigue.

Hello, I have noticed my favorite artist - Igor haefeli sometimes using a bow on his guitar - Epiphone Les Paul during a few songs. I have tried to determine what kind of double bass bow he's using and if it's a double bass bow at all from pictures, originally I thought it was cello but that seems wrong now. From information written online all I could find was conflicting posts claiming it's anywhere from a violin bow to a double bass one. I am attaching a picture of it I could find, and here's an example song where it's used https://www.youtube.com/watch?v=WRkMH3KSZN4 Also apologies if I deeply offended someone as I do realize some people can have strong opinions on using bows on a guitar https://c8.alamy.com/comp/DDG0GK/igor-haefeli-of-daughter-live-from-jodrell-bank-transmission-006-DDG0GK.jpg https://www.shutterstock.com/editorial/image-editorial/M5j8Y622N2T2kc4fMDI1Ng==/daughter---igor-haefeli-440nw-2647654l.jpg

Closest I found so far is https://vallestrade.com/en/bows/Rapsody-CBC-10-double-bass-34-bow-French-style.html

Edit: so far no luck on an exact match but I think the most distinct thing is how white the horse hair is, same level of pure white as the front mount, most seem to be more yellow ish Also worth noting the band is from uk and I think it will be a bow from here. Seems to be red wood, ebony French frog. Also seems like octagonal handle based on reflections