Sirius VA-5x head and Tricer BA not compatible?

[bobco]

been doing a little updating, bought a Sirui va-5x head last week and Tricer BA for my swaro SLC 10x42. found out today that doesn't work. Really liked the thought of the arca Swiss BA and no plate required. Head has a long numb in the middle and BA only has 1/4 hole, the old square peg in round hole problem. ?Maybe drill the BA out to fit? update, drilled out the Tricer BA so adapter fits flush on the 5X base. thats all good but shoulders on the BA are bigger than the Sirui , so it does not lock down correctly. So i ordered a Sirui arca swiss plate to mount the BA to, not where i wanted to go but here we are. Anyone wanting to use the Tricer BA so you don't need another plate maybe in for a surprise. I guess there is no standard for this Arca Swiss standard plate dimensions....beware....