That’s how they do it on the latest V7 Guzzi’s. Stick down the hole method.... the 'Redneck' way! ... you have the spark plugs out I take it? roll the motor over until you see the valves changing in rapid succession .. roll it just a bit further then stick something like a thin wooden dowel in the spark plug hole, keep rolling the motor and feel it come up to TDC .. as I said .. Redneck way