As part of the original agreement back in the 1970's, Vekoma could use the Arrow track style and in exchange, they had to buy Arrow trains and components. This lasted until 1989 for the Looping Coaster, but parks still wanted to use Arrow trains even if Vekoma had designed their own looping coasters. Vekoma also built three "Swinging Turns" Suspended Coaster and as per the agreement to use the Arrow Suspended track style, those three opened with Arrow Suspended Coaster trains.
While all that was happening, in 1988, Vekoma came out with their own track and trains, the MK-700 and MK-900. The MK-700 features narrower track and used Bobsled style 2 person cars with a unique extendable lap bar to secure riders. The MK-900 was wider and used two across seats and both gave very smooth attractions. Werner Stengel office was even used to calculate the layouts on those.
"Space Mountain" at Formosan Aboriginal Cultural Village in Taiwan. This is a 1992 Vekoma MK-700 very inspired by Space Mountain at Disney.