I don't know how it will work with the TM pump but I can inflate the Neo Air inside a tent with the Instaflator.
(I tried that inside the TT Moment)
Connect the pump to the Neo Air. Put the Neo Air against a wall side ways. Have the valve at the top corner opposite to you.
Unroll the bag blow in it so it opens up and then roll it towards the valve. It takes for me about 3 'loads" instead of about 2.5 but it is doable.
Not that I would bother with the std Neo but once I make an adaptor for my pre built-in pump Exped it maybe worth doing.
Franco