What about the swings? The graphics art appear to be the Zierer model but the rotational direction is the zamperla flying carousel. Vekoma was making coasters long before Arrow started with their loopers Once vekoma decided to build inverting coasters they turned to Arrow for guidance.
Sorry, that´s not true. Vekoma used to start out as a builder for farm- and mining supplies. In the mid-sixties they built their first ferris wheels. Their first coasters were built by licencing the Arrows track-profile in the mid-1970s.
In the early 1980s they started to build coasters with the Arrow track, but using their own designs, this culminated in the invention of the Boomerang. Up until then they bought their rolling stock from Arrow.
By the mid-eighties Vekoma began to build non-inverting coasters using their own track design (Mine-Trains and indoor-coasters (MK-700 & MK-900)).
The SLC´s were also their own invention, in which they just turned the Arrow track upside-down. The rolling-stock was Vekoma´s own (devillish) invention....
...which reminds me: we´re missing the classic SLC in PlanCo.