Hi John,

Just to check I am getting this right...

The current situation is that with all three of your weights in place and moved as far forward towards the arm's pivot point as possible, I'm unable to obtain the correct VTF of 2.6g with my 103. I can only get 2.1g.

So I presume I need more mass on the counterweight balance to resolve this, presuming that I want the whole counterweight balance as close to the arm's pivot point as possible?

I always get a bit mixed up with this!

Once confirmed, I'll work out what extra 'grammage' I require.

Marco.