Kris
Based on your descriptions, I’m a little confused here; maybe you made a boo-boo or have the original Modelbau PowerBox 40/24 not the latest version… It sounds like you have an Emcotec DPSI RV Mini (LDO), no?
“The Powerbuspro will handle 4 servos/channel for 6 channels. . the Emcotec will handle 6 channels with 4 servos, 4 with 2 servos, and 2 with a single servo each.”
The PowerBox Pro and Emcotec specifications I have do not correspond with your statement above.
The PowerBox offers seven amplified channels with four channels providing three servo ports and three channel providing four ports. Unless you have an earlier model Pro unit.
The Emcotec Mini RV offers five amplified isolated channels with three channels providing two servo ports and two channels providing single ports.
The "Mini RV" cannot support 40-50 amps (specs say 14amp). The PowerBox is rated at 40amps.
There are many features of each unit that are significant and not mentioned thus far.
The PowerBox Pro was designed for small to large models with a servo load of 24 units currently via seven channels, (previously six channels). Lithium battery technology is not supported with this model (inline regulators can be used). Additional channels are supported through the RX. This is not Modelbau’s top of the line model and does not represent comparable features to the Emcotec RV series. The previously offered Emcotec DPSI 2001 draws a closer comparison unit to unit.
The Emcotec RV’s incorporate onboard voltage regulators supporting all battery technologies with user defined output parameters to the servo buss. Together with audible intelligent voltage monitoring alerts and provides service ports to read pack voltages.
The Emcotec RV offers twelve amplified isolated channels with four single ports channels, two; two port channels and six four port channels.
The "Mini RV" was designed for small models with lower power demands carrying eight servos through the device and two additional channels via the RX while the "RV" is designed for full house models with as many as thirty-two servos.
I am also using the Emcotec RV unit and a Modelbau PowerBox 40/24 Duralite Plus unit. I have yet to shake them out completely but thus far see no problems. These units are a good head to head match, IMO for our comparisons. I'm using Lithium power batteries with a higher servo counts than are required of your highly modified lightweight 40% models.