Me too.
The reason I do it is, it's very hard to find comparables and Sod's law...
I invariably have a long telephone discussion with the underwriter and to why, no, that's a slushbox, and no, that's a 3.0 pop-up, etc..
They do seem flexible with mid-term adjustments, to be fair.
Nick
“I find myself irresistibly attracted to cars that nobody else buys. The NSX is a classic of the genre because nobody buys it and yet it’s a fantastic car. It’s got a wonderful compactness and simplicity and unpretentiousness to it. Honda rudely continues to make them whether we like it or not, even though there can be no commercial logic in doing so — I thoroughly admire that.” Rowan Atkinson