seven branch candelabra

Parshas Hashavua

part 1

לא תעשון אתי אלוהי כסף

The Gemoro (Avoda Zarah 53a) and Shulchan Aruch (Y.D. 141-8)  say that one is not allowed to replicate the shulchan and  menorah  etc. of the Bais Hamikdash. The type of metal or size doesn't matter.  You may not make a seven branch Menorah.

R.Akiva Eiger's son in law (R. Shmuel Birnbaum zt"l) writes that his  Shver had a silver Shiviti candelabra with seven spouts and  took it to a silver smith who with great difficulty managed to add  on an additional spout.

Reb Akiva Eiger seems to hold like the Poskim* that being we  are dealing with an Issur De'orysa  (לא תעשון אתי) therefore  all seven branch  Menoras are forbidden, regardless of the  shape (cups are in a straight  line or in a circle etc.)

*Bchor Shor- Pischei teshuva