This table just lists the combined weights of thruster+steering for
available atomic engine combos, so you can find something that fits in
your engine bay & available outfit space.

While efficiency varies, with atomic engines a heavier part is always also
more performant than a light one.

30 Both Basrem(0)
34 Basrem(0) steering, A12(1) thrust
34 Basrem(0) thrust, A12(1) steering
38 Basrem(0) thrust, Benga(2) steering
38 Both A12(1)
40 Basrem(0) steering, Benga(2) thrust
42 A12(1) thrust, Benga(2) steering
44 A12(1) steering, Benga(2) thrust
47 A12(1) thrust, A25(3) steering
48 Both Benga(2)
50 A12(1) steering, A25(3) thrust
53 Benga(2) thrust, A25(3) steering
54 Benga(2) steering, A25(3) thrust
59 Both A25(3)
60 Benga(2) thrust, Biroo(4) steering
64 Benga(2) steering, Biroo(4) thrust
66 A25(3) thrust, Biroo(4) steering
69 A25(3) steering, Biroo(4) thrust
72 A25(3) thrust, A37(5) steering
76 Both Biroo(4)
78 A25(3) steering, A37(5) thrust
82 Biroo(4) thrust, A37(5) steering
85 Biroo(4) steering, A37(5) thrust
91 Both A37(5)
93 Biroo(4) thrust, Bondir(6) steering
95 Biroo(4) steering, Bondir(6) thrust
101 A37(5) steering, Bondir(6) thrust
102 A37(5) thrust, Bondir(6) steering
112 Both Bondir(6)
113 A37(5) thrust, A52(7) steering
120 A37(5) steering, A52(7) thrust
123 Bondir(6) thrust, A52(7) steering
131 Bondir(6) steering, A52(7) thrust
139 Bondir(6) thrust, Bufaer(8) steering
142 Both A52(7)
153 Bondir(6) steering, Bufaer(8) thrust
158 A52(7) thrust, Bufaer(8) steering
164 A52(7) steering, Bufaer(8) thrust
174 A52(7) thrust, A86(9) steering
180 Both Bufaer(8)
187 A52(7) steering, A86(9) thrust
196 Bufaer(8) thrust, A86(9) steering
203 Bufaer(8) steering, A86(9) thrust
219 Both A86(9)