It's not large actually, but of course, if you feel it's a hassle, then you better don't leave your eyes away from your laptop
You are asking for sophisticated solution which cost a lot more, but have you consider if they are effective at all ?

All I need to do is dissemble your laptop and take out parts I'm interested in

Do you think your security measure will still work ?
If you know you are going to some places and you are going to leave your laptop alone, then I suggest you have such a lock.
Question for you is, where are you going all the time ? Can you just leave the lock at the place you will be at, provided it's a place you will always be there.