By Tom Gott Arsenal manager Mikel Arteta has admitted the Gunners have been forced to move slower in the summer transfer window because of new Profit & Sustainability Rules (PSR). New financial regulations, which have already led to points deductions for both Everton and Nottingham Forest, have caused major changes across the Premier League and led to a flurry of activity before June 30 as teams sought to avoid major losses to end the financial year. Fears of PSR have seen Arsenal take a measured approach to the summer window. The Gunners are yet to bolster their squad aside from turning David…