Got a set off ebay the same. They do add a bit more feel to the pedal but you still need half a mile to stop at 60!
Fitting was relatively straight forward, but you will need a 10mm brake pipe spanner...soak the joints all around with plenty WD40 and leave for 15min or longer then gently tease them apart.
John
__________________
______________________________
the older I get, the faster I was