Jack,
Late last night I started into the 2 Cdn Armd Bde War Diary. It provides copies of some of the orders issued to 6 CAR during May which are not included in the 6 CAR War Diary. The briefing schedule for Overlord is included.
The HQ 2CAB diary for the period 20 Apr - 31 May was written as a narrative because “no daily records were made”. On approx 15 May, HQ 2 Cdn Armd Bde replaced all rubber track on Shermans and replaced them with steel track! This was done during their period of waterproofing and modifying their AFVs.
https://heritage.canadiana.ca/view/o...51/937?r=1&s=4
While I haven’t noticed a written order to subordinate units to change all track to steel, 6 CAR was engaged with waterproofing and modifying their tanks the week after their higher headquarters. This modifying might have included changing any rubber track to steel.