He did. What actually happened was: tried his 2nd engine at Glasgow which had been good previously, but after first heat it wasn't good, so swapped to 2nd bike with his usual Workington engine. After his 3rd ride that engine blew up immediately after the race snapping its camchain. Back onto first bike for heat 13 with some big changes and managed to get a win whilst feeling slow. For Workington, now only had one bike so borrowed an engine from Jacob Hook ( as his workshop is in Workington) that was "strong" so that he had 2 bikes (the alternative was a 20 hr round trip to home to collect a spare engine, but only had 19 hrs before the next meeting). Tried Hooky's engine in the first 2 heats but struggled to get out of the starts with it ( heavier flywheels than normal may have been the difference? but jumped back onto the underperforming engine again for the last 2 rides and made some radical changes again and managed to win heat 13 again with a massive cutback off the first turn and a defensive ride. Was out after the meeting on that same underperforming engine trying some other radical changes to see if they helped it to perform better. So a frustrating weekend some high points, some low points and no doubt a big bill to come too.
Hope that explains what happened