One of the reasons for having the blades across on the 205 was that with the up tilted exhaust (anti IR missiles), you could easily cook a blade during start, same applied to the 206 with ‘bunny ear’ exhausts. Never had the problem with 212s or 214s.
Why not have a small can, painted red, which you can place over the cyclic when the tie-down is in place. The tie-down can go in the tin when removed and stowed in the boot. However, I’m with the crab on this one, why not just make sure your walk-round is a good one, (called AIRMANSHIP!!)