So the pool is up at last (Intex 14 X 42):

After 3 weeks of leveling - will see how it goes when we fill it.
We bought the 16 inch Intex Sand filter. I am now sat in an array of hoses, plungers, inlets, outlets, etc. I have watched countless YouTube videos and read hundreds of threads on this board (the only way I have gotten this far).
The upgraded pump comes with a inlet valve which has the bigger fittings (1.5) to match:

I am going to cut the pool (!) to fit this through as the existing inlet is 1.25. So that will give me 1.5 back into the pool. Then I have the dual suction outlets - these are unfortunately also 1.25. I was/am willing to cut those holes to be bigger but it turns out the upgraded pump does not come with the 1.5 outlet strainer connectors (not sure if correct terminology). Also, does not come with the two 1.5 hoses I would need. So I believe I need to stick with the 1.25 strainer connectors for both outlets that came with the pool:

I would then use the hoses and t-junction that comes with the pool - and then connect the bottom of the t-junction to the 1.5 into the pump by converting the 1.25 bottom of the T to 1.5 using this B Adapter:

Will running these two 1.25 hoses into my larger filter (with the appropriate connectors) be a problem with volume of water flow to the pump?
Lastly, I also purchased 2 plunger valves:

I think I should put one on the inlet back to the pool (looks like will screw on to the 1.5 inlet that came with the upgraded pump). Is this correct? The plunger valves seems to be 1.25 so I would need to use the adapter to get it to connect to the 1.5 I am cutting into the liner. Would this make the larger 1.5 opening pointless (because the 1.5 hose from the pump would connect to the 1.25 plunger valve to then go back to the 1.5 strainer that I cut to fit?
If this is the correct place for this plunger valve, where should I put the other one? Directly at the pump to stop the flow from both of the suction outlets? Or perhaps on the suction outlet where I will install my over the wall skimmer?
Thanks in advance for any help and apologies for the long question! We are only going to be able to have this pool up for this summer (Covid/HOA restrictions).

After 3 weeks of leveling - will see how it goes when we fill it.
The upgraded pump comes with a inlet valve which has the bigger fittings (1.5) to match:

I am going to cut the pool (!) to fit this through as the existing inlet is 1.25. So that will give me 1.5 back into the pool. Then I have the dual suction outlets - these are unfortunately also 1.25. I was/am willing to cut those holes to be bigger but it turns out the upgraded pump does not come with the 1.5 outlet strainer connectors (not sure if correct terminology). Also, does not come with the two 1.5 hoses I would need. So I believe I need to stick with the 1.25 strainer connectors for both outlets that came with the pool:

I would then use the hoses and t-junction that comes with the pool - and then connect the bottom of the t-junction to the 1.5 into the pump by converting the 1.25 bottom of the T to 1.5 using this B Adapter:

Will running these two 1.25 hoses into my larger filter (with the appropriate connectors) be a problem with volume of water flow to the pump?
Lastly, I also purchased 2 plunger valves:

I think I should put one on the inlet back to the pool (looks like will screw on to the 1.5 inlet that came with the upgraded pump). Is this correct? The plunger valves seems to be 1.25 so I would need to use the adapter to get it to connect to the 1.5 I am cutting into the liner. Would this make the larger 1.5 opening pointless (because the 1.5 hose from the pump would connect to the 1.25 plunger valve to then go back to the 1.5 strainer that I cut to fit?
If this is the correct place for this plunger valve, where should I put the other one? Directly at the pump to stop the flow from both of the suction outlets? Or perhaps on the suction outlet where I will install my over the wall skimmer?
Thanks in advance for any help and apologies for the long question! We are only going to be able to have this pool up for this summer (Covid/HOA restrictions).