Merc,Yamaha, Stazo, outboard locks?

[bigeasy1]

Looking for some info on the best outboard motor lock.

Last fall,thieves almost got away with my new T8 yamaha kicker.They had nicely disconnected the electrical harness and shift/throttle controls.I had one of the slide on type(Master Lock)locks that slide and lock over the clamps.
I also had the engine bolted to the permanent mount.The crooks were able to simply cut the end of the slide on lock with a pair of bolt cutters or a battery die cutter and slide the lock off.They also had only one mounting bolt left to remove before they got scared off by a passing store owner.

I've researched some locks and have it down to three brands,all of which use a hardened cylinder that locks over one of the clamps. First is a Stazo which is made in the netherlands,second are the Mercury and Yamaha which(from what I hear)are similar to the Stazo.These are all a bit pricy,but worth it.I know that there is no such thing as 100% sure,but they are far better than the slide on types.
I'm also going to use MCguard nuts along with permanent loctite on the mounting bolts.

**Can anyone tell me where I can see pictures of the Merc and Yamaha locks? I tried their websites but don't see them listed*** If anyone has experience with any of these or another type,I'd like to hear about it. I'm Not interested in a slide on type like the master lock one,they're too easy to cut

Any info is appreciated,thanks all.