Tobias, I do not have time to spend answering non-essential questions. There are many “interesting” questions/issues that a lot of people waste time on.
– As the Buddha explained to venerable Mālunkyāputta in the “The Shorter Discourse to Mālunkyāputta (MN 63)” Buddha Dhamma is not about investigating “interesting worldly things.” It is about ending the samsaric suffering.
– Besides, I have given the relevant answer, even though it may not be the direct answer that you are looking for.
I think it would be more beneficial to focus on the issue of pancakkhandha.
– Rupa is different from rupakkhandha. Rupakkhandha consists of MENTAL impressions of rupa. It is essential to understand that. I have given the references. Please go through them and ask questions from there if not clear.
– What you quoted, “Tattha katamaṁ rūpaṁ? Cattāro mahābhūtā, catunnañca mahābhūtānaṁ upādāyarūpaṁ— idaṁ vuccati “rūpaṁ” is about rupa. But rupakkhandha has mental impressions of rupa.
You wrote: “When one builds vinnana for a future activity that will be stored in pancakkandha or namarupa (as mind-made image).”
– That is not quite correct. Pancakkhada are MOSTLY records of past rupa experienced together with accompanying mental aggregates (“present rupa” and “future rupa” are also included in rupakkhandha). For example, say I saw a nice car yesterday. That event has an image of a rupa associated with it (image of the car). In addition, there were vedana, sanna, sankhara, and vinnana associated with that event. They all got added to pancakkhandha.
– Namarupa are mental images that come to one’s mind WHILE one is engaged with an arammana in the idappaccayātā PS. Again, read the post “Viññāna Paccayā Nāmarūpa“. I have revised most of it to make it a bit more clear. Please let me know if it is not clear. Maybe I need to write two posts to discuss the two types of PS.
– In the upapatti PS, namarupa is the “seed” formed by the merging of the gandhabba with the zygote in the womb. I realized that those old posts need to be re-written with further explanations. These are a bit hard to grasp because different types of namarupa come into play in different cases.
I am not sure what the last part of your comment is about. It seems to be connected to the previous part. May be you can re-phrase the question after resolving the rupa/rupakkhandha and namarupa issues.