Spark plug tool is a good idea. Have you got any tips on removing & replacing cam gears with the cams under valve spring pressure?
Adjusters all the way up, rubber bands on the adjusters to the frame or a head bolt etc to keep some pressure on the pushrods so you don't drop one. Use a couple of sockets and handles on the cam wheel nuts to hold in position. As I said, its a PITA and a fiddle, but is still quicker than a pseudo 'top end rebuild'. if you don't need one. And its not the cam gears that are hard, its the intermediate that is the tricky one. Holding everything together while sliding it in place is hard.