^That would be my "top tip" - use cable ties.

Use one on the caliper to hold it to the swingarm, as you've done, and three tightly holding the sprocket to the spokes keeping the sprocket carrier and cush drive in check. Then as mentioned, small plank of wood to hold the wheel up, and grease up the spacers to hold them in place.

TBH, once you've done it a couple of times it becomes second nature. First time is always a PITA.

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