Ah but you say your saw is years old, so probably made with quality steel then. They don't make quality steel products thesedays. Just look at the crap we have to install, tinfoil traywork and trunking, metal conduit you can bend across your knee, and what about the wonderful "defiance" (not) drills, holesaws, etc that would'nt last boring holes through cheese, Take them off the shelves and bin em Newey & Eyre l.o.l. M6 roofing bolts now come with half the depth nuts, impossible to use in most applications with just 3-4 biting threads. How some of the crap supplied that we're expected to work with get's a B.S. Kitemark and is allowed on the market astounds me. Sorry to stray off topic but give me yesteryears harware products anyday, sorry rant over l.o.l. !!!!!
"Sintra" no need for any spotting accessory (inside) with the P.L.S. 180 as it's beam throws through more than 180 degrees both horizontaly and vertically. Stringlines and pluming up from from floor to ceiling especially around support R.S.J's above etc are a piece of cake with this type of tool !!!!