just a little tip for you and anyone else wanting to send heavy items through the post.
I can highly reccommend
https://www.parcel2go.com/
They collect the parcel from your home address on the day and time slot you choose and you can track the item on line from the minute it leaves your door.
I sold a exhaust system for a motorbike on fleabay last year, sent it recorded delivery with these people for 8 quid when parcel force wanted 25!!
Collected and delivered by DHL or city link - whichever opperate in your area.