As I have said before on other threads I think the best solution is to mount a 49 note controller keyboard under the Ty2 and midi it to play the left hand. This gives you the full 61 note upper board for the right hand stuff and a very useful spread for the left hand.

As an old organ player this feels very natural and comfortable. I use a Roland PC49
controller which is very light and slim enabling it to fit right up tight under the Tyros.

This gives me a 110 note keyboard. Just think what one of those would weigh if anyone was mad enough to manufacture one.

I use an ordinary Kwik-Lok stand which I have adapted by shoving a couple of lengths of broomhandle into the tubing with small shelf brackets screwed in to take the Roland. Very compact and no extra stand to lug about.

Just another alternative.

Trevor