The last time that i went for a ride with my TC, it felt somewhat lazy so i thought i d' better have a look at the ignition timing. Timing light on the flywheel and it was obvious that at idle, the timing varied at what looked like 3 or more degrees. Taking the average of that, it seemed indeed to be around the TDC, so i turned the distributor a little in order to bring it back up to the required 6 degrees BTDC. Now the car drives better, but i wonder about the timing scatter at idle (at speed it looks to be rather stable). The timing chains must be well worn now, at around 110K miles, and at least the top one feels somewhat slack on finger pressure. So, do i have to blame the timing chains only, or could wear in the distributor cause this problem? The distributor is a standard Lucas 25D4, with Lumenition magnetronic fitted.