If make more than 1 change then it's not like for like you have to go back whatever the limit was at the start of the season which if I remember was 40. So with Poole being 41.26 eff 1st June could fair out 10.77 and replace with a maximum 9.51 if I have my maths correct. 

If Starke (3.7) and Kerr (7.07) were to make way, totaling to 10.77, and Carins comes in on a 2 does that not leave 8.77 for the pirates to play with?  That would leave the pirates a few options like Ben Cook(should be back on the bike in a month and maybe looking for more meetings to get himself fit and make up for lost time/ earnings) and even Scott Nicholls if he’s recovered and not retired

They not RS though. That is just in the Prem. Plus Glasgow have two 2 pointers. 

Also do the rules allow a team to run two RS riders ?

Nothing in the fixture list on the Edinburgh website about Saturdays match at Glasgow but is on the Glasgow one.

Yes he did well for Redcar until he hurt his wrist near the end of his last season with the club, then he would declare himself fit for Peterborough's title chasing team but injured for Redcar meetings.