UPDATE: Well i must admit i have been pleasantly surprised, i had the HT leads trimmed and plug caps changed to the NGK ones and lo and behold the problem seems to have been fixed!!
I tried different gears in the offending 2000-2500rpm range and all the 'jittering' seems to have gone, and the engine actually sounds and feels a bit smoother as well.
Happy days, and thanks again for the tip, and input.
I tried different gears in the offending 2000-2500rpm range and all the 'jittering' seems to have gone, and the engine actually sounds and feels a bit smoother as well.
Happy days, and thanks again for the tip, and input.

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