How much difference will there be to my rear XTR v-brake if i swap the current cheapy £5 Outland brake booster http://www.raleigh.co.uk/pandadetails.aspx?ID=3629 for a £20 echo one... http://www.tartybikes.co.uk/product.php?id=13 i mean, the brake works fine for me, but i can still see the frame (pashley 26mhz) flexing when i brake, so im thinking it could be BETTER.