I used to spend more time trying to find leaking manifold fittings and hoses than it now takes me to evacuate a 65' EL new lineset.(Less than 20 minutes to 190mics).Less is definently better when it comes to evacs.
I bought the basic one and added a high pressure transducer. Then I bought extra pipe straps off of e-bay. I only use it for SC & SH readings. I have other tools that I use for air velocity and volume.