Mazda B2500TD & Courier 2.5TD - modification

I am very happy with my Bravo B2500TD and hope the following is of assistance to fellow owners.
Please contemplate any potential effects prior to carrying out this modification (I was unable to come up with any negatives and to date have not experienced any).
Suggested mod to improve power on the above vehicles.
In the quest for improved performance I have experimented with the following modification on my 2001 Bravo 4x4 Dual Cab and have had pleasing results.
The mod consists of purchasing 2.0 meters of 4.7mm dia. (3/16") fuel hose and four clamps (cost2000rpm has smoothed out and generally the engine seems to rum better. I have not noticed a significant change in the higher engine rev range.
There does not appear to be any significant change in fuel consumption although this may depend on driving style.
Also, I have found that the following valve clearances (measured between camshaft and valve rocker when cold) work best - 0.08 mm for inlet and 0.18mm for exhaust (these are within the suggested range of 0.05mm - 0.15mm inlet and 0.15 mm - 0.25 mm exhaust).
I would be ineterested to here of results from anyone who tries or who has tried this mod.

Iceburg.