Early tennis markets – exchange no longer works, looking for discussion/test

Hi.

I used to trade early tennis lines on Betfair exchange.
Recently early tennis markets appear very late and it is hard to capture value via exchange.

I still work with early tennis prices and understand where the line should be.
Now I am looking for discussion or a small test with people who have execution
(soft bookmakers / brokers), but do not have early edge.

Not selling tips.
Talking about early line movement and market correction.

If this sounds relevant, happy to discuss.