Insurance for Acro planes?

[Bill Greenwood]

A man came into Boulder today in his Sukhoi 26 acro plane so I went down to talk to him. I didn't get much detail but when I asked two questions, here is what he said:

No, it was not hard to fly,
But it was hard to get insurance for.

He said they required 25 hours in type, which is common to many planes; but also 500 hours of tailwheel time!
asked who he had insurance with, and he sort of mumbled something that was not very clear.

I have not heard of any such requirement just for a tailwheel airplane, has anyone else?

And it is just single seat, no passenger exposure.