What problems do you have with your clems? May be we can help?
About Jackmanii - clems looking for vertical support first. This is in their nature. Those shoots that have support grow much longer and stronger. Than they start to build up mass using its own stems as a support. Your Jakcmanii will cling everywhere and spill out of your structure. Probably, not in the first year but in the fifth for sure. Is it what you want?