For 8 and 9 yards you could use a CF adapter or you could establish aim points on measured targets and then either estimate like you do in HFT or remember the degree of blurriness
FT targets can come down to 8 yards and if it's a 15mm then your range estimation could be critical.
A CF lens is about £40 then you will need a BC to fit it into, like hens teeth apparently.Using the CF is exactly the same as for any other target.
My suggestion is learn your 8 and 9 yard settings unless you have a CF and a BC at hand.
Nice seeing you at Springfield last week