Sachtler FSB 4 Fluid Head

Hi, you can remove the stud and use it with 3/8" screw on a flat base tripod or slider

No, the Sachtler FSB 4 Fluid Head works with the Sachtler Sideload Plate S/Ace Tripod QR Plate ( BH #SAWPDV1 ) only. However, you could add a quick-release adapter below to the Sachtler Ace plate, which would convert it to Manfrotto if needed. Manfrotto 577 Rapid Connect Adapter with Sliding Mounting Plate (501PL) BH #MA577

On the articulating arms that B&H has available for mounting accessories, their end mounting screws are either 1/4'-20 or 3/8 -16. The screw holes Sachtler uses to mount their pan handles are an unlisted, unknown metric size so I am afraid the accessory articulation arms will not mount. Otherwise it is valid idea. So much so that Manfrotto makes some of their tripod heads to take 3/8 arms for just the purpose you are proposing. They call it Easy Link. Here is a comparable Manfrotto head with the Easy Link mounts, plus a Manfrotto arm. Manfrotto 509HD Professional Video Head B&H # MA509HD and Manfrotto 244 Micro Friction Arm B&H # MA244MICRO.

unsure, but you dont want that dainty head. It's trash

yes, it will

With plastic head's, the main compromise that is made is in rigidity and flex. If you deal with heavier cameras, with pretty tight tilt and pan settings, you may end up with a degree of flex back with the Ace vs the FSB. If you lock an ACE down completely, and push on the camera, you can actually see the head move a bit...may not be an issue to most people.

yes