Lowering kit for SDR

Has anybody got any experience with these lowering kits for the SDR.
It says that it would lower the rear by 25mm so am i right by saying that dropping the forks to suit at the front would compensate.
Also has anybody made their own as they do seem on the expensive side for what they are.

http://www.ebay.co.uk/itm/200860586801? ... 1423.l2649

Would 25mm really make that much difference for you?

Im pretty sure the SD shock is slightly shorter compared to the SDR, someone might know by how much exactly, but dropping the forks that much is a bad idea as changes geometry too much.

Not sure if SDR shocks are slightly longer also.

SDR shock "is" longer,,,,,

SDR shock is 6mm longer forks to

sdr shock is 394mm eye to eye, I think sd shock is 384

Ive already had my SDR shock re-sprung and re-valved for my weight and riding but saw these lowering things and just wondered if they ok.
Im on my tip toes,ok when riding but just abit awkward when manovering around.
I understand i could drop the front but just wouldnt want to upset the handling.
Any thoughts please