Thank you for writing,
The design you are using differs from ours and we currently don't have support for such scenario. We are planning to extend the customization capabilities of the calendar after all features are present, stable and ready for use.
We will be releasing a service pack in about two weeks from now. We have implemented drawing of only horizontal and vertical grid lines as well as showing only the cells of the current month without cells from the previous/next months. These are all features you will need for your design, so I suggest you wait if possible for the release, so you can use them out of the box.
I have logged the request for the cells to be able to have different size than the calendar rows. However I cannot promise it will be available for the coming release of the service pack.
We value your feedback and will use it to further develop the calendar to be more easy to use and pleasant to work with.
Thank you for your time and all best!