Stick with a local busy rolling road! Make sure they can sort carbs- many can't - I've spent good money & not been happy. as above wait for a cancelled booking - if they are busy they are good!!! Dont look at other cars with carbs because they are heavier & go 'on throttle' a lot more than our little light cars. So their settings won't help. a rolling road will help iron out flat spots & sort out mixture etc- she"ll be fine afterwards