Have you weighed your rods?
What was the variation?
Probably if you gave the heavy ones an extra clean & a rub with a bit of emery to get the last of the mill scale off. The weights would be very similar.
The color codes are probably for new rods, its a bit like using second hand pistons if you have only honed the bores, if you can get pistons that are from the larger diameter range, you will get a better fit in a worn bore.

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1967 230-6 auto parts car. rust bucket.
1980 300D now parts car 800k miles
1984 300D 500k miles
1987 250td 160k miles English import
2001 jeep turbo diesel 130k miles
1998 jeep tdi ~ followed me home. Needs a turbo.
1968 Ford F750 truck. 6-354 diesel conversion.
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