There is an Erbhaur(spelling?) one for £38 which gets loads of good reviews along with a slotted diamond disk for about£16
TBH if somebody would do it for £300 I would happily pay as we have clawed back a fair bit of the budget elsewhere.
the ones i looked at were mostly big firms doing concrete stuff on large refurb and construction sites or were workshops cutting granite etc.
A firm in Croydon are at least looking at the pics of the sill and will get back to me...
There is an Erbhaur(spelling?) one for £38 which gets loads of good reviews along with a slotted diamond disk for about£16
TBH if somebody would do it for £300 I would happily pay as we have clawed back a fair bit of the budget elsewhere.