"...Growing for seeds is almost more fun than sensi..."
Alternative is as mentioned to just shake some dry pollen into a plastic bag (brødpose), transport that pollen to the females in the bag and just either pull the bag over the branch or plant you want pollinated or shake the pollen out of the bag over the female. Make sure the pollen is kept absolutely 100% dry at all times.
The males will release pollen before the females are ready to catch it, it may not be a bad idea to remove the males and let the females develop bud for a week or two before pollination in order to get a bigger harvest. if the males are left in the spot for the duration of the grow, they will continuously release pollen on the new shoots, its possible that a one time only pollination will give a better (more) bean yield then if the plants are allowed to be continuously pollinated through the season because the one time only pollination will likely lead to that more beans are ripe at the same time. However the risk lies in waiting too long with the pollination as the beans needs at least 4 weeks to mature. One must pollinate the females no later then week 3 of flowering, indoor i usually pollinate around day 20-25, outdoor i will probably pollinate around day 15 or so of flowering.. Just before the first trichomes start to show..
i hope my explaining isnt too confusing best of luck