Wheel ?
 

I was using my Ivy leaf wheel the other day with forest foliage cart. and I was having trouble with the center of the wheel inking correctly on the paper. The edges were fine but the center was weak. Any suggestions?

http:////www.splitcoaststampers.com/...ighlight=wheel

Many have had the same problem! It's all in your technique. There are several great hints there. It even got me digging out my wheels!