I also did mine today, but I don't think you got the full benefit from the purge. Optimally you might have been better off to isolate the fuel tank by either using a plastic bottle and running the purge undiluted directly into the pre-filter. I purchased a plastic bottle with hoses and fittings from another source and it was extremely easy and yes a great improvement. I just got the car so it's complete history was unknown to me. I actually ran two bottles thru, changed the canister filter and the pre-filter.