FL310 - the harddrive was a 5MB - 20kg unit
Was this for a laptop
The first machine I had at home had 2 HD units, 5MB fixed and 5MB dustbin lid on each unit. Each unit came in at 70kg.
The wife was not amused.
I have been in the business for 20 years and have no problem with FL310's advice. I have never cooked a chip yet. I would suggest however a lot can be gained by hitting a machine while switched off before resorting to opening a cabinet.
If you cant afford to screw your machine get in a professional - but it will cost. If its more than a year old its probably worth less than £400 in total and you are hard pushed to screw everything in one go.