Solomons papers- equivalent ums boundaries? if any teachers can guess

I think there is too much hype on solomon papers and how much harder they are.
At the end of the day some will be easier for you than others whether than is a 'real' past paper or the solomon ones. Some of the old edexcel spec papers and practice papers were tough. Its often the way when papers are written at the start of a new syllabus (as Solomon were).
Solomon were designed to be tougher, they were written in line with what the spec said would be in the course. Remember too that since then it could be argued the exams have been watered down.
I would be more concerned about nailing each topic and thinking how you can get max marks on the real exams.
I personally would get far more out of the Solomon worksheets than the exam papers. I think the later questions on each worksheet are far more interesting and look at building understanding.

They are often kicking about online (rightly or wrongly!).
I won't post a link up out of respect for the copyright but they are pretty easy to find.

They are like only a tiny bit harder than normal core papers but for mechanics it's a different story...

ok, so basically i 88% would probably be around the same as a normal paper, so like 90ums?