Here's Sam Trueheart. 
Here's Main Drain in new footage. 
Here's David Trueheart.

NOTE: All small footage of Main Drain is new footage however all Giant footage of him is Sentai footage.
In Ohranger, he was always shown as a Giant so there was no small footage of him available.



Following info comes from Ohranger 19.
Here are shots of Giant Main Drain.
 

 


Here's a shot of the damaged Zeo Megazord in the Zeozord Holding Bay.
Here's some closer shots of the damaged Zeo Megazord.

 
Here's another shot of the damaged Zeo Megazord.
Here's a shot of the Red Battlezord in the Zeozord Holding Bay.
Here's a shot of the Red Ranger in the Red Battlezord's Deactivated Cockpit.
Here's a shot of the Red Ranger's Zeonizer Crystal being used to activate the Battlezord.
Here's a shot of the Red Ranger in the Red Battlezord's Activated Cockpit.
Here's the Red Battlezord.  


Here's another shot of the Red Ranger in the Red Battlezord Cockpit.
Here's another shot of the Red Battlezord.