In v5.20, ships of 500 tons or less can no longer use maintenance facilities and must use hangars instead. Parasites already rewind their maintenance clocks while in hangars so this element of maintenance facilities is already handled.
There are also some changes to maintenance modules for v5.20:
1) They are now commercial systems
2) They can carry out overhauls
3) They are size 125 instead of size 25, although their cost remains at 200.
This allows the design of large maintenance ships that can create temporary bases. Don't forget that the maintenance capacity of multiple ships in the same location is cumulative. Here is an example of a ship intended to provide an independent base of operations for a FAC flotilla. It has sufficient maintenance modules for ships of up to 1000 tons, supplies of fuel and maintenance plus a cargo hold to carry the required minerals.
Wolverine class FAC Tender 39,100 tons 850 Crew 1608 BP TCS 782 TH 1200 EM 0
1534 km/s Armour 1-102 Shields 0-0 Sensors 1/1/0/0 Damage Control Rating 1 PPV 0
Maint Capacity 1026 MSP Max Repair 200 MSP
Cargo 5000
Maintenance Modules: 5 module(s) capable of supporting ships of 1000 tons
Commercial Magneto-plasma Drive (6) Power 200 Fuel Use 6% Signature 200 Armour 0 Exp 1%
Fuel Capacity 500,000 Litres Range 383.5 billion km (2893 days at full power)
This design is classed as a Commercial Vessel for maintenance purposes
The ship below is more of a bare bones design, intended to provide or supplement maintenance facilities for an existing colony. It doesn't carry any supplies of its own. Five of these ships operating together would provide sufficient maintenance facilities for ships of up to 10,000 tons.
Mackenzie class Maintenance Vessel 57,400 tons 1423 Crew 2503 BP TCS 1148 TH 1000 EM 0
871 km/s Armour 1-132 Shields 0-0 Sensors 1/1/0/0 Damage Control Rating 1 PPV 0
Maint Capacity 27 MSP Max Repair 200 MSP
Maintenance Modules: 10 module(s) capable of supporting ships of 2000 tons
Commercial Magneto-plasma Drive (5) Power 200 Fuel Use 6% Signature 200 Armour 0 Exp 1%
Fuel Capacity 50,000 Litres Range 26.1 billion km (347 days at full power)
This design is classed as a Commercial Vessel for maintenance purposes
Steve