As far as I know, there is no way to trade SCOT A/ SCOT B on steem-engine.
You have to trade SCOT A/STEEM then STEEM/SCOT B.
I sure would love it though :-)
I think there is just not enough liquidity and volume on many of the tokens to make other pairs available. Would be a lot of work to keep the spreads reasonable.
Thanks for the reply... That's what I was afraid of, but so what! ...Steem On!