I got the T2 when it first came out and the F75 when it first came out. I like them both and one is as stable as another. If not you need to send it back and have it serviced. I had to send both of mine in for tweaking. The T2 came back a different machine. The F75 came back better too but the T2 is really stable. There are a few more bells and whistles on the F75 like the backlight but... you cannot turn it off and some don't like that. They both have a great bottle cap program. Some say that the F75 is a deeper machine but almost all places I hunt are hard clay and depth isn't really much of an issue. If I need depth for relics or iron I use a SovereignGT, if I need depth for coins etc I use an E-TRAC. For speed and general use, like a time limited hunting situation... either the T2 or the F75 is a great, if not the best choice. I used my T2 pretty much exclusively for about a year then I used the F75 exclusively for over a year. Then I got an SE and struggled with it for about a year and when I would get frustrated I would switch to the F75. (I never did get comfortable with the SE). However the E-TRAC was immediately comfortable and usable. I decided to sell the F75 to a friend who really liked it and I kept the T2... and am happy with the decision. There is really very little difference in the field, IMO... others may disagree.
I just got the small coil for the T2 yesterday!!! I am excited to try it. I know a couple of places that are full of crappy junk but there are some good items there too. I'm going to try it this PM. If the small coil improves the T2 the way the small coil improves the Tejon... then this is going to be one great machine!
One other thing... I said that I would use the SovereignGT for deep iron like artillary but in AM the T2 goes pretty deep and covers much more ground. However the F75 has a different, static AM mode that will go even deeper. You have to stop every 10' or so and reset it but it is really deep for clean ground with possible deep targets.
They are both light and comfortable... however, (I seem to use that word a lot...), even with the extra weight I can swing the E-TRAC longer than the T2. I have upper, cervical, spine problems... bad disks between my shoulderblades and for whatever reason the ET does not hurt me as much, I don't know why since the T2 is lighter.
If you don't have either of them and if you are coming from a machine like a Tesoro or a Sovereign... you will think that something is wrong with your T2/F75 because it will signal everything in the ground, even the minerals if the disc is low enough. You will hear so many signals that you will think something is wrong with your machine. It takes some getting used to if you are coming from a quiet machine. Your brain has to learn to deal with all the signals that sometimes sound like chatter. The processor in the T2 and the one in the F75 both work faster than your mind can process the info... at first but you get used to it. Either machine can be used to clean out a site by using AM, or 1 tone and a low disc like 10, and keeping your eye on the TID and by digging everything that jumps up above 20/21 some of those will be good targets in iron that are averaged down and sound like iron but the TID gives you a hint that there may be something there. I hunt a lot with the disc on 10 and 2+ tones but in iron you will miss some targets because they will sound like iron if iron is also in the hole, only the TID will give you the ID in some cases. If use this at productive sites after having hunted a spot out with the 2+. There is always more...
J