Victoria British lists a Lockheed remote replacement servo kit for my Tiger 1A. Mine came with no servo/bypassed. They list the 5" as for my B3820000522. The 7" is the same price as the 5", $299. Will the 7" also fit my car but give me more stop with less effort? It surprises me to see these kits new for $300. I have seen, and almost bought, a rebuilt one on eBay for $600. I was about to upgrade to a smaller bore master cylinder when I found these @VB. Any advice would be appreciated.