As others have said, the 103R will NEVER work on your Green dot UP4 arm. Your arm is super light and requires a VERY light and compliant cart. The 103R is the polar opposite -- heavy and stiff and needs a very heavy arm. I’m 100% sure of this as I currently own the 103R, and owned the UP4 in the past.
IMO, some of the advise here is getting way too complicated and expensive to implement. Best option is to just get an appropriate cartridge and use what you have. Problem is, there’s not many very compliant modern carts that meet your needs.
Look into the Cartridge Man Music Maker 3. Do the research -- lesser known here in America d/t poor marketing, but VERY highly regarded HO cart designed to mate well with light unipivot arms. I own it, excellent cartridge. Check online, tons of very positive pro and user reviews.
I used my MM3 on Hadcock 242 and Moerch UP4 arms. Both are lightweight unipivots. Excellent on both. I used the red dot arm tube on my Moerch, and that is what Moerch recommends for the MM3 cart. It is only 3 grams heavier than your green dot tube. I’m sure a headshell weight can easily be added to yours, some ideas here:
https://www.google.com/search?rlz=1C1CHZL_enUS813US813&q=headshell+weight&tbm=isch&sourc...
Who knows, it may even work with your green dot.
My Hadcock and Moerch arms are both now sold, but I still have the MM3 cart. I can’t use it as all my arms are now heavier fixed pivots, so it’s available. Let me know if interested, I can give you a VG price easily within your price range. I’m so confident that (1) it will be compatible with your situation, and (2) it will bring the musical goods, that I will offer a money back guarantee if it doesn’t work for you. Use is a few hundred hrs, condition is excellent. I can throw in the Music Maker "Isolator" (do your research). It is designed to work with the MM3 cart, and will add 2g in mass.
PS: if you wanna stay with the 103R, the earlier suggestion of a Jelco arm is a good one. I pair my 103R with my 10 inch Jelco 750E and it is excellent.
PPS: I had the SS Carmen is my system for awhile. Nice cart, but the MM3 is significantly better in terms of transparency, nuance and inner detail.
IMO, some of the advise here is getting way too complicated and expensive to implement. Best option is to just get an appropriate cartridge and use what you have. Problem is, there’s not many very compliant modern carts that meet your needs.
Look into the Cartridge Man Music Maker 3. Do the research -- lesser known here in America d/t poor marketing, but VERY highly regarded HO cart designed to mate well with light unipivot arms. I own it, excellent cartridge. Check online, tons of very positive pro and user reviews.
I used my MM3 on Hadcock 242 and Moerch UP4 arms. Both are lightweight unipivots. Excellent on both. I used the red dot arm tube on my Moerch, and that is what Moerch recommends for the MM3 cart. It is only 3 grams heavier than your green dot tube. I’m sure a headshell weight can easily be added to yours, some ideas here:
https://www.google.com/search?rlz=1C1CHZL_enUS813US813&q=headshell+weight&tbm=isch&sourc...
Who knows, it may even work with your green dot.
My Hadcock and Moerch arms are both now sold, but I still have the MM3 cart. I can’t use it as all my arms are now heavier fixed pivots, so it’s available. Let me know if interested, I can give you a VG price easily within your price range. I’m so confident that (1) it will be compatible with your situation, and (2) it will bring the musical goods, that I will offer a money back guarantee if it doesn’t work for you. Use is a few hundred hrs, condition is excellent. I can throw in the Music Maker "Isolator" (do your research). It is designed to work with the MM3 cart, and will add 2g in mass.
PS: if you wanna stay with the 103R, the earlier suggestion of a Jelco arm is a good one. I pair my 103R with my 10 inch Jelco 750E and it is excellent.
PPS: I had the SS Carmen is my system for awhile. Nice cart, but the MM3 is significantly better in terms of transparency, nuance and inner detail.