Pierre...if it's of help, there is a huge thread on the merits/demerits of the TW arm. It's clearly a well manufactured and thought out design but there are plenty of others.
The Phantom, as you say, has a known synergy with the Raven (I use one myself) and is one of the best engineered implementations of a unipivot you will find anywhere.
You should be able to get arm boards for the Raven for the above 2 arms easily enough but with delays of up to 6 months? (Which is quite normal for small manufacturers)
I'm probably wrong but I'm not so sure about a plenitude of Raven/Kuzma 4-point owners(?) It doesn't matter. If necessary TW should be able to create an adaptor or unique armboard but again I would expect a reasonable delay?
The Phantom, as you say, has a known synergy with the Raven (I use one myself) and is one of the best engineered implementations of a unipivot you will find anywhere.
You should be able to get arm boards for the Raven for the above 2 arms easily enough but with delays of up to 6 months? (Which is quite normal for small manufacturers)
I'm probably wrong but I'm not so sure about a plenitude of Raven/Kuzma 4-point owners(?) It doesn't matter. If necessary TW should be able to create an adaptor or unique armboard but again I would expect a reasonable delay?