Goodmorning at all , can someone help me? I want to buy a 4x5 enlarger , and i found a 138 with cls 301 color head. But i haven't any manual and information for the CLS 301 !! In particular can a LATIBOX 138 (mixing box for the 5x7 or 13x18) print 4x5 films? or i have to buy the latibox 450 for the 4x5 ?