Sue,
You need a tool like you mentioned to alter the spring setting.
Well, I just learned something about KONI shocks, there is a rubber boot at the top, and I never paid any attention to it, after seeing Sue's post about an adjustment , I went out to look at mine, and much to my surprise, there is an adjustment dial , I have had the shocks 15 years and never knew I had any adjustments other than spring preload !!!!!!!!!!!!!!!!!!!
When I changed mine, I had a small bottle jack under one end of the swing arm, adjusted it to get the holes lined up.
Sue, did you make sure you got the right side shock in the correct hole, there are a few 'extra' holes on the right side, for police accessories.