I am looking at this type of drive system also. I have had no dealings with it. Several other machines have been designed & built using timing belt most usually with both ends tied to the gantry & if driven from both sides a drive shaft is most usually used either at the gantry or at one end of the table.
Most seem to be using the steel cord belt as opposed to kevlar.
You can find several examples in the plasma & router tables Group(s)