TreasureHunter81
New member
I'm new to the forum, so sorry if this has been discussed already.  I am swinging a V3I with the factory coil and am wondering what would be the best coil to upgrade to (if any).  I am looking for more stable, more depth and less interference while using all three frequencies.  I have had this machine for about a year and half and have a decent understanding of the general features, but know very little about different coils and their compatibility with this power house.    Thanks in advance.