Steve,
As I said, and as the article confirms, connecting all batteries to common bus-bars is your best option. You're going to have some resistance no matter what you do, but at least with the bus-bar method you'll have balance, and few interconnections between each battery and the inverter. The fewer the interconnections, the less resistance.
You can use a good quality digital voltmeter to check for problems at every connection point. Check each connection point while the inverter is heavily loaded.
John
