Actually, I have had some unhappy experience on my Facebook last month.
Somehow it came back to me finally a good experience.
Anyway, I completed drawn up a my own design plan about monitor telescopic arm& yoke last week.
and my machinist partner done it yesterday.
There be many excellent yokes&arms in the market such as Sachtler's,MK-V's,Tiffen's and GPI's
but there be no yoke that compatible with my marshall 70xp-3gsdi monitor.
That is the reason why I started this design plan.
Hope to hear any advice from ALL of REAL STEADICAM OPERATOR.