I can only speak based on plastic ones I 3D printed - which were exact as per the templates but did not fit.
I have alloy plates on my P3S and my P3P ... they fit exact without any error at all.
These are the ones I fitted .... (but there are many sellers on Ebay with same ... )
4Pcs Metal Motor Protect Mount Base RC Quadcopter Kit for DJI Phantom 3 | eBay
One thing I like - the plates come with screws that use commonly available tools instead of star drivers etc. as DJI use.
Now points that are very important :
1. Stock screws for motor are short and MUST be saved in case you ever remove the plates. The plates supply slightly longer screws to compensate for the plate thickness.
2. You must use the tube standoffs with the two thinner screws at inner end .. this supports and locks shells
3. Get plastic safe BLUE Threadlock and use it to secure motor screws.
Myths that are ****** :
1. Extra weight causes cracks ..... that's pure rubbish and not true.
2. Extra weight shortens flight time .... if you are flying to max time on a P - then you are risking it anyway - but the plates actually are so light as to make literally no difference to flight times or flight itself
Thats my 2c worth anyway ..
Nigel
I have alloy plates on my P3S and my P3P ... they fit exact without any error at all.
These are the ones I fitted .... (but there are many sellers on Ebay with same ... )
4Pcs Metal Motor Protect Mount Base RC Quadcopter Kit for DJI Phantom 3 | eBay
One thing I like - the plates come with screws that use commonly available tools instead of star drivers etc. as DJI use.
Now points that are very important :
1. Stock screws for motor are short and MUST be saved in case you ever remove the plates. The plates supply slightly longer screws to compensate for the plate thickness.
2. You must use the tube standoffs with the two thinner screws at inner end .. this supports and locks shells
3. Get plastic safe BLUE Threadlock and use it to secure motor screws.
Myths that are ****** :
1. Extra weight causes cracks ..... that's pure rubbish and not true.
2. Extra weight shortens flight time .... if you are flying to max time on a P - then you are risking it anyway - but the plates actually are so light as to make literally no difference to flight times or flight itself
Thats my 2c worth anyway ..
Nigel