Hello!
I'm WHMCS admin user/developer already since v2.2 (somewhere in year 2006), did many template customization, hacks & hooks, provisioning modules and payment gateways (last was The Ethereum payment gateway for WHMCS 7.5.2).
I would love to integrate your template on the 3 pages, in addition if you have any qustion in regard to WHMCS, possible hooks i am ready for brain storming.
Looking forward working with you,
Mathew