I'm flying out to Spain for the Euskadi Open next month & have purchased a Hardigg Storm im3300 to transport my Pro Target in during the flight over. A friend of mine gave me a really tough looking padlock, one of those circular one's, but I've just tried it & although the hole provided is the right size, the angle of the curve on the lock bar won't pass all the way through. Any suggestions for a good lock to do the job? I don't want to have to buy expensive locks to try them for size & the case itself is a bit big to haul around DIY stores asking questions. Cheers in advance for any advise provided.