Whereabouts are you in the country I am quite willing to help you out because I have the path guide to to kit for drilling the holes please send me your details and if I can help I will do so thank you
I have the parf guide system I would be willing to help if you are close by where abouts are...
That type of float assembly is the worst one you can buy it's cheap and nasty go to your nearest Toolstation and get the VEVO assembly viiva they do bottom entry top entry side entry get the one with the brass fitting more reliable easy to fit it and no more problems