Infinity focus? FD lens on EOS with EF Life Size Adapter

I was reading that the EF Life Size Adapter can actually be used on more lenses than just the EF 50mm f/2.5 Compact Macro. Another statement was made that the EF Life Size Adapter maintained infinity focus with the EF 50mm f/2.5 Compact Macro. Which got me wondering if it might do the same with an FD lens, in a non-optical EOS adapter.

From what I've heard most of the optical FD to EOS adapters are crap. I ordered a EF Life Size Adapter today. I already have a EF 50mm f/2.5 Compact Macro and was going to try the EF Life Size Adapter with my Sigma 70-200 f/2.8 as a macro lens.

Anyone happen to have a EF Life Size Adapter, and an FD lens with a non-optical EOS adapter that could test to see if the two together retain infinity focus?